/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/hard2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:29:47,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:29:47,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:29:47,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 23:29:47,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:29:47,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:29:47,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:29:47,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 23:29:47,375 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:29:47,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:29:47,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:29:47,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:29:47,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:29:47,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:29:47,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:29:47,376 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:29:47,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:29:47,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:29:47,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:29:47,378 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:29:47,378 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:29:47,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:29:47,378 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:29:47,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:29:47,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:29:47,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:29:47,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:29:47,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:29:47,580 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:29:47,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-04-06 23:29:47,652 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7c069fc/f28662d6eae54c81bd9f4d29a00e3456/FLAGa3757ad30 [2022-04-06 23:29:47,997 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:29:47,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-04-06 23:29:48,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7c069fc/f28662d6eae54c81bd9f4d29a00e3456/FLAGa3757ad30 [2022-04-06 23:29:48,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7c069fc/f28662d6eae54c81bd9f4d29a00e3456 [2022-04-06 23:29:48,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:29:48,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:29:48,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:29:48,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:29:48,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:29:48,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ecabf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48, skipping insertion in model container [2022-04-06 23:29:48,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:29:48,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:29:48,148 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/hard2_valuebound1.c[526,539] [2022-04-06 23:29:48,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:29:48,183 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:29:48,197 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/hard2_valuebound1.c[526,539] [2022-04-06 23:29:48,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:29:48,227 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:29:48,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48 WrapperNode [2022-04-06 23:29:48,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:29:48,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:29:48,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:29:48,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:29:48,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:29:48,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:29:48,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:29:48,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:29:48,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (1/1) ... [2022-04-06 23:29:48,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:29:48,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:48,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 23:29:48,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 23:29:48,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:29:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:29:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:29:48,306 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:29:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:29:48,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:29:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:29:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:29:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:29:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:29:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 23:29:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:29:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:29:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:29:48,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:29:48,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:29:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:29:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:29:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:29:48,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:29:48,358 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:29:48,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:29:48,486 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:29:48,491 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:29:48,491 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:29:48,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:29:48 BoogieIcfgContainer [2022-04-06 23:29:48,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:29:48,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:29:48,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:29:48,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:29:48,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:29:48" (1/3) ... [2022-04-06 23:29:48,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ebcd4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:29:48, skipping insertion in model container [2022-04-06 23:29:48,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:29:48" (2/3) ... [2022-04-06 23:29:48,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ebcd4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:29:48, skipping insertion in model container [2022-04-06 23:29:48,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:29:48" (3/3) ... [2022-04-06 23:29:48,514 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.c [2022-04-06 23:29:48,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:29:48,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:29:48,568 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:29:48,573 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 [2022-04-06 23:29:48,573 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:29:48,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:29:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:29:48,607 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:48,608 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:48,608 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-04-06 23:29:48,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:48,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1543764819] [2022-04-06 23:29:48,638 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-04-06 23:29:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:48,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355554004] [2022-04-06 23:29:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:48,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:48,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:48,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:29:48,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:48,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355554004] [2022-04-06 23:29:48,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355554004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:48,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:48,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:29:48,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1543764819] [2022-04-06 23:29:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1543764819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:48,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:29:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674490877] [2022-04-06 23:29:48,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:48,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:29:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:29:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:29:48,860 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:48,954 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-04-06 23:29:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:29:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:29:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:48,963 INFO L225 Difference]: With dead ends: 61 [2022-04-06 23:29:48,963 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 23:29:48,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:29:48,971 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:48,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 23:29:49,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 23:29:49,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-04-06 23:29:49,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-04-06 23:29:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:49,016 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-04-06 23:29:49,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-04-06 23:29:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 23:29:49,017 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:49,017 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:49,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:29:49,018 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-04-06 23:29:49,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794444977] [2022-04-06 23:29:49,027 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:49,027 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-04-06 23:29:49,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:49,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045924013] [2022-04-06 23:29:49,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:49,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:29:49,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:49,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045924013] [2022-04-06 23:29:49,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045924013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:49,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:49,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794444977] [2022-04-06 23:29:49,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794444977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854791836] [2022-04-06 23:29:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:49,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:29:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:29:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:49,154 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:49,322 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 23:29:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 23:29:49,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:49,327 INFO L225 Difference]: With dead ends: 43 [2022-04-06 23:29:49,328 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 23:29:49,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:29:49,333 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:49,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 23:29:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 23:29:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 23:29:49,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-04-06 23:29:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:49,351 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 23:29:49,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 23:29:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 23:29:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 23:29:49,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:49,352 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:49,352 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:29:49,353 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-04-06 23:29:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88953842] [2022-04-06 23:29:49,358 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-04-06 23:29:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:49,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504502367] [2022-04-06 23:29:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:49,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:29:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:29:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 23:29:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:29:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 23:29:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504502367] [2022-04-06 23:29:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504502367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:49,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88953842] [2022-04-06 23:29:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88953842] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202057899] [2022-04-06 23:29:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:49,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:29:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:29:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:49,432 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:29:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:49,562 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 23:29:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 23:29:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:49,564 INFO L225 Difference]: With dead ends: 47 [2022-04-06 23:29:49,564 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 23:29:49,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:29:49,566 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:49,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 23:29:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-04-06 23:29:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 23:29:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-04-06 23:29:49,580 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-04-06 23:29:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:49,580 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-04-06 23:29:49,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 23:29:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-04-06 23:29:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 23:29:49,581 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:49,581 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:49,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 23:29:49,581 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-04-06 23:29:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206681117] [2022-04-06 23:29:49,582 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-04-06 23:29:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:49,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766029396] [2022-04-06 23:29:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:49,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:49,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926873062] [2022-04-06 23:29:49,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:49,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:49,593 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:49,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 23:29:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 23:29:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 23:29:49,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:29:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766029396] [2022-04-06 23:29:49,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926873062] [2022-04-06 23:29:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926873062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:49,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206681117] [2022-04-06 23:29:49,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206681117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:49,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:49,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192263469] [2022-04-06 23:29:49,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:49,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:29:49,754 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:29:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:49,807 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 23:29:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 23:29:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:49,809 INFO L225 Difference]: With dead ends: 66 [2022-04-06 23:29:49,810 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 23:29:49,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:49,814 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:49,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 23:29:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 23:29:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 23:29:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-04-06 23:29:49,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-04-06 23:29:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:49,828 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-04-06 23:29:49,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:29:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-04-06 23:29:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 23:29:49,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:49,829 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:49,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 23:29:50,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:50,036 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-04-06 23:29:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775476116] [2022-04-06 23:29:50,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:29:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-04-06 23:29:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:50,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697967118] [2022-04-06 23:29:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:50,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:50,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598799034] [2022-04-06 23:29:50,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:50,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:50,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:50,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 23:29:50,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:29:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:29:50,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:29:50,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697967118] [2022-04-06 23:29:50,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:50,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598799034] [2022-04-06 23:29:50,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598799034] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:50,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:50,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:50,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:50,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775476116] [2022-04-06 23:29:50,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775476116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:50,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:50,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:50,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606752857] [2022-04-06 23:29:50,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:50,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:50,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:29:50,194 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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) [2022-04-06 23:29:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:50,241 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-04-06 23:29:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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 34 [2022-04-06 23:29:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:50,244 INFO L225 Difference]: With dead ends: 65 [2022-04-06 23:29:50,244 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 23:29:50,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:29:50,245 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:50,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 23:29:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 23:29:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 23:29:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-04-06 23:29:50,307 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-04-06 23:29:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:50,307 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-04-06 23:29:50,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 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) [2022-04-06 23:29:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-04-06 23:29:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 23:29:50,308 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:50,308 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:50,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:50,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:50,509 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-04-06 23:29:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:50,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1061117864] [2022-04-06 23:29:50,528 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:50,528 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-04-06 23:29:50,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632126108] [2022-04-06 23:29:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:50,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:50,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038714152] [2022-04-06 23:29:50,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:50,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:50,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:50,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:50,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 23:29:50,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 23:29:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 23:29:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 23:29:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632126108] [2022-04-06 23:29:50,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038714152] [2022-04-06 23:29:50,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038714152] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:29:50,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:29:50,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 23:29:50,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:50,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1061117864] [2022-04-06 23:29:50,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1061117864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:50,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:50,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:29:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941445050] [2022-04-06 23:29:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:50,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:29:50,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:29:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:29:50,808 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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) [2022-04-06 23:29:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:50,866 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 23:29:50,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:29:50,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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 44 [2022-04-06 23:29:50,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:50,869 INFO L225 Difference]: With dead ends: 69 [2022-04-06 23:29:50,869 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 23:29:50,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:29:50,869 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:50,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:29:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 23:29:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 23:29:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 23:29:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 23:29:50,877 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-04-06 23:29:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:50,878 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 23:29:50,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 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) [2022-04-06 23:29:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 23:29:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 23:29:50,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:50,879 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:50,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:51,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:51,080 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-04-06 23:29:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69736379] [2022-04-06 23:29:51,084 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:51,084 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-04-06 23:29:51,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:51,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038353677] [2022-04-06 23:29:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:51,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:51,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277008629] [2022-04-06 23:29:51,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:51,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:51,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:51,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 23:29:51,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:51,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:29:51,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:29:51,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 23:29:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038353677] [2022-04-06 23:29:52,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277008629] [2022-04-06 23:29:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277008629] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:29:52,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:29:52,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 23:29:52,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:52,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69736379] [2022-04-06 23:29:52,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69736379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:52,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:52,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:29:52,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355537910] [2022-04-06 23:29:52,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:52,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:29:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:29:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:29:52,236 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:29:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:52,383 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-04-06 23:29:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:29:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-04-06 23:29:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:52,385 INFO L225 Difference]: With dead ends: 130 [2022-04-06 23:29:52,385 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 23:29:52,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:29:52,386 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:52,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:52,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 23:29:52,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 23:29:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:29:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-04-06 23:29:52,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-04-06 23:29:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:52,397 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-04-06 23:29:52,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 23:29:52,398 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-04-06 23:29:52,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 23:29:52,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:52,399 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:52,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 23:29:52,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:52,611 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-04-06 23:29:52,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:52,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255280563] [2022-04-06 23:29:52,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:52,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-04-06 23:29:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:52,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449877952] [2022-04-06 23:29:52,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:52,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:52,621 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:52,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400000201] [2022-04-06 23:29:52,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:29:52,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:52,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:52,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:52,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 23:29:52,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:29:52,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:52,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:29:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:29:52,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:29:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:53,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449877952] [2022-04-06 23:29:53,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400000201] [2022-04-06 23:29:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400000201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:29:53,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:29:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 23:29:53,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:53,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255280563] [2022-04-06 23:29:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255280563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:53,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:29:53,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241239978] [2022-04-06 23:29:53,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:53,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:29:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:29:53,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 23:29:53,919 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:29:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:54,001 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-04-06 23:29:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 23:29:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-04-06 23:29:54,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:54,006 INFO L225 Difference]: With dead ends: 126 [2022-04-06 23:29:54,006 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 23:29:54,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 23:29:54,007 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:54,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:29:54,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 23:29:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 23:29:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 23:29:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-04-06 23:29:54,028 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-04-06 23:29:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:54,028 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-04-06 23:29:54,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 23:29:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-04-06 23:29:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 23:29:54,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:54,032 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:54,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:54,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:54,248 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-04-06 23:29:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:54,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [542120633] [2022-04-06 23:29:54,253 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:54,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-04-06 23:29:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:54,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619647447] [2022-04-06 23:29:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:54,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:54,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275384448] [2022-04-06 23:29:54,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:29:54,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:54,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:54,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 23:29:54,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:29:54,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:54,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 23:29:54,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 23:29:54,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:29:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 23:29:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:29:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619647447] [2022-04-06 23:29:54,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:29:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275384448] [2022-04-06 23:29:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275384448] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:29:54,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:29:54,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 23:29:54,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:29:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [542120633] [2022-04-06 23:29:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [542120633] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:29:54,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:29:54,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 23:29:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69495729] [2022-04-06 23:29:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:29:54,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 23:29:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 23:29:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 23:29:54,912 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:29:55,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:29:55,146 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-04-06 23:29:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:29:55,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 23:29:55,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:29:55,147 INFO L225 Difference]: With dead ends: 109 [2022-04-06 23:29:55,147 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 23:29:55,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:29:55,148 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:29:55,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:29:55,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 23:29:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 23:29:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:29:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-04-06 23:29:55,154 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-04-06 23:29:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:29:55,154 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-04-06 23:29:55,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 23:29:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-04-06 23:29:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 23:29:55,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:29:55,155 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:29:55,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 23:29:55,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:55,376 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:29:55,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:29:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-04-06 23:29:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:29:55,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403938550] [2022-04-06 23:29:55,379 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:29:55,379 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:29:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-04-06 23:29:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:29:55,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896768451] [2022-04-06 23:29:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:29:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:29:55,385 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:29:55,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198362697] [2022-04-06 23:29:55,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:29:55,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:29:55,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:29:55,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:29:55,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 23:29:55,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 23:29:55,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:29:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 23:29:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:29:55,699 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:29:55,711 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:29:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 23:29:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:30:24,354 WARN L232 SmtUtils]: Spent 13.08s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:31:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 23:31:11,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:11,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896768451] [2022-04-06 23:31:11,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:11,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198362697] [2022-04-06 23:31:11,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198362697] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:31:11,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:31:11,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 23:31:11,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:11,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403938550] [2022-04-06 23:31:11,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403938550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:11,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:11,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:31:11,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944643356] [2022-04-06 23:31:11,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:11,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:31:11,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:31:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2022-04-06 23:31:11,565 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:11,731 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-04-06 23:31:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:31:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-04-06 23:31:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:11,732 INFO L225 Difference]: With dead ends: 106 [2022-04-06 23:31:11,732 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 23:31:11,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2022-04-06 23:31:11,733 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:11,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:31:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 23:31:11,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-04-06 23:31:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:31:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 23:31:11,744 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-04-06 23:31:11,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:11,744 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 23:31:11,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 23:31:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 23:31:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 23:31:11,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:31:11,747 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 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] [2022-04-06 23:31:11,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 23:31:11,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:11,960 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:31:11,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:31:11,960 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-04-06 23:31:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:11,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [549149465] [2022-04-06 23:31:11,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 23:31:11,962 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 23:31:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-04-06 23:31:11,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:31:11,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532534417] [2022-04-06 23:31:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:31:11,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:31:11,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:31:11,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704644105] [2022-04-06 23:31:11,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:31:11,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:31:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:31:11,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:31:11,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 23:31:12,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:31:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:31:12,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 23:31:12,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:31:12,196 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 23:31:12,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:31:12,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:31:12,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532534417] [2022-04-06 23:31:12,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:31:12,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704644105] [2022-04-06 23:31:12,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704644105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:12,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:12,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:31:12,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:31:12,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [549149465] [2022-04-06 23:31:12,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [549149465] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:31:12,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:31:12,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 23:31:12,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675763526] [2022-04-06 23:31:12,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:31:12,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 23:31:12,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:31:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 23:31:12,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 23:31:12,198 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 23:31:12,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:31:12,248 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-04-06 23:31:12,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:31:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-04-06 23:31:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:31:12,249 INFO L225 Difference]: With dead ends: 91 [2022-04-06 23:31:12,249 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 23:31:12,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:31:12,249 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:31:12,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 103 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:31:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 23:31:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 23:31:12,250 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) [2022-04-06 23:31:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 23:31:12,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-04-06 23:31:12,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:31:12,250 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 23:31:12,250 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 23:31:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 23:31:12,250 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 23:31:12,252 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 23:31:12,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 23:31:12,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 23:31:12,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 23:31:13,095 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 23:31:13,095 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 23:31:13,096 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 23:31:13,096 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-04-06 23:31:13,096 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 61) the Hoare annotation is: true [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-04-06 23:31:13,096 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 61) the Hoare annotation is: true [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~B~0 1)) (.cse1 (= main_~B~0 main_~d~0)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (= (+ main_~d~0 main_~r~0) main_~A~0) .cse0 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse1 .cse2))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2022-04-06 23:31:13,097 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-04-06 23:31:13,097 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 1)) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 23:31:13,097 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,097 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|)) [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 23:31:13,098 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:31:13,098 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 23:31:13,098 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:31:13,098 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 23:31:13,098 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 23:31:13,100 INFO L719 BasicCegarLoop]: Path program histogram: [8, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 23:31:13,101 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 23:31:13,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 11:31:13 BoogieIcfgContainer [2022-04-06 23:31:13,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 23:31:13,120 INFO L158 Benchmark]: Toolchain (without parser) took 85105.66ms. Allocated memory was 172.0MB in the beginning and 251.7MB in the end (delta: 79.7MB). Free memory was 121.9MB in the beginning and 96.8MB in the end (delta: 25.1MB). Peak memory consumption was 104.6MB. Max. memory is 8.0GB. [2022-04-06 23:31:13,120 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory was 138.6MB in the beginning and 138.5MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 23:31:13,120 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.68ms. Allocated memory was 172.0MB in the beginning and 209.7MB in the end (delta: 37.7MB). Free memory was 121.8MB in the beginning and 185.6MB in the end (delta: -63.8MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-04-06 23:31:13,121 INFO L158 Benchmark]: Boogie Preprocessor took 23.40ms. Allocated memory is still 209.7MB. Free memory was 185.6MB in the beginning and 184.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 23:31:13,122 INFO L158 Benchmark]: RCFGBuilder took 251.72ms. Allocated memory is still 209.7MB. Free memory was 184.5MB in the beginning and 172.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 23:31:13,123 INFO L158 Benchmark]: TraceAbstraction took 84612.55ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 172.0MB in the beginning and 96.8MB in the end (delta: 75.2MB). Peak memory consumption was 117.6MB. Max. memory is 8.0GB. [2022-04-06 23:31:13,124 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory was 138.6MB in the beginning and 138.5MB in the end (delta: 74.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.68ms. Allocated memory was 172.0MB in the beginning and 209.7MB in the end (delta: 37.7MB). Free memory was 121.8MB in the beginning and 185.6MB in the end (delta: -63.8MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.40ms. Allocated memory is still 209.7MB. Free memory was 185.6MB in the beginning and 184.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 251.72ms. Allocated memory is still 209.7MB. Free memory was 184.5MB in the beginning and 172.5MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 84612.55ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 172.0MB in the beginning and 96.8MB in the end (delta: 75.2MB). Peak memory consumption was 117.6MB. 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: 17]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 84.5s, OverallIterations: 11, TraceHistogramMax: 13, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 224 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 1170 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 791 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1201 IncrementalHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 379 mSDtfsCounter, 1201 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 852 GetRequests, 755 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 15.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=8, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 389 PreInvPairs, 507 NumberOfFragments, 598 HoareAnnotationTreeSize, 389 FomulaSimplifications, 240 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 35 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 0.6s 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: ((((((0 <= A && A == r) && A <= 1) && q == 0) && B == 1) && B == d) && p == 1) || ((((((0 <= A && A == r) && B * 2 == d) && p == 2) && A <= 1) && q == 0) && B == 1) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: 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! [2022-04-06 23:31:13,141 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...