/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:14:57,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:14:57,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:14:57,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:14:57,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:14:57,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:14:57,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:14:57,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:14:57,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:14:57,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:14:57,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:14:57,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:14:57,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:14:57,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:14:57,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:14:57,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:14:57,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:14:57,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:14:57,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:14:57,851 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:14:58,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:14:58,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:14:58,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:14:58,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:14:58,053 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:14:58,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-04-07 00:14:58,106 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb40d86b/f350893016f44818bc3811a91ec5d6ea/FLAGaa20a2439 [2022-04-07 00:14:58,455 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:14:58,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2022-04-07 00:14:58,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb40d86b/f350893016f44818bc3811a91ec5d6ea/FLAGaa20a2439 [2022-04-07 00:14:58,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb40d86b/f350893016f44818bc3811a91ec5d6ea [2022-04-07 00:14:58,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:14:58,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:14:58,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:14:58,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:14:58,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:14:58,481 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23d46d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58, skipping insertion in model container [2022-04-07 00:14:58,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:14:58,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:14:58,611 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2022-04-07 00:14:58,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:14:58,626 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:14:58,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2022-04-07 00:14:58,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:14:58,645 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:14:58,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58 WrapperNode [2022-04-07 00:14:58,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:14:58,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:14:58,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:14:58,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:14:58,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:14:58,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:14:58,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:14:58,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:14:58,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (1/1) ... [2022-04-07 00:14:58,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:14:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:58,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-07 00:14:58,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:14:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:14:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:14:58,769 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:14:58,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:14:58,852 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:14:58,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:14:58,857 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:14:58,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:14:58 BoogieIcfgContainer [2022-04-07 00:14:58,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:14:58,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:14:58,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:14:58,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:14:58,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:14:58" (1/3) ... [2022-04-07 00:14:58,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d6c9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:14:58, skipping insertion in model container [2022-04-07 00:14:58,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:14:58" (2/3) ... [2022-04-07 00:14:58,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d6c9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:14:58, skipping insertion in model container [2022-04-07 00:14:58,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:14:58" (3/3) ... [2022-04-07 00:14:58,863 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2022-04-07 00:14:58,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:14:58,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:14:58,935 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:14:58,954 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-07 00:14:58,955 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:14:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:14:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:14:58,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:58,973 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:58,973 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:58,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:58,979 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-04-07 00:14:58,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:58,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232985675] [2022-04-07 00:14:58,995 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 2 times [2022-04-07 00:14:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:58,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668006442] [2022-04-07 00:14:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:58,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:59,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:14:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:14:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:59,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:14:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:14:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:14:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:14:59,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668006442] [2022-04-07 00:14:59,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668006442] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:59,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:59,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:14:59,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:59,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232985675] [2022-04-07 00:14:59,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232985675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:59,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:59,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:14:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930455728] [2022-04-07 00:14:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:59,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:14:59,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:14:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:14:59,216 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:14:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:59,281 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-07 00:14:59,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:14:59,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-07 00:14:59,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:59,289 INFO L225 Difference]: With dead ends: 57 [2022-04-07 00:14:59,289 INFO L226 Difference]: Without dead ends: 27 [2022-04-07 00:14:59,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:14:59,294 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:59,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:14:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-07 00:14:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-07 00:14:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-07 00:14:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-07 00:14:59,328 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-04-07 00:14:59,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:59,329 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-07 00:14:59,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:14:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-07 00:14:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:14:59,330 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:59,331 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:59,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:14:59,331 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:59,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-04-07 00:14:59,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999924524] [2022-04-07 00:14:59,335 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 2 times [2022-04-07 00:14:59,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:59,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454624376] [2022-04-07 00:14:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:59,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:59,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167685327] [2022-04-07 00:14:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:59,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:59,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:59,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:59,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:14:59,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:14:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:14:59,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:14:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:14:59,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:14:59,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:14:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454624376] [2022-04-07 00:14:59,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:14:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167685327] [2022-04-07 00:14:59,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167685327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:59,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:59,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:14:59,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:14:59,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999924524] [2022-04-07 00:14:59,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999924524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:14:59,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:14:59,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:14:59,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640320265] [2022-04-07 00:14:59,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:14:59,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:14:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:14:59,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:14:59,576 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:14:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:14:59,641 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-04-07 00:14:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:14:59,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-07 00:14:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:14:59,642 INFO L225 Difference]: With dead ends: 39 [2022-04-07 00:14:59,643 INFO L226 Difference]: Without dead ends: 37 [2022-04-07 00:14:59,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:14:59,644 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:14:59,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 87 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:14:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-07 00:14:59,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-04-07 00:14:59,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:14:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-04-07 00:14:59,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-04-07 00:14:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:14:59,663 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-04-07 00:14:59,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:14:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-04-07 00:14:59,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-07 00:14:59,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:14:59,665 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:14:59,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:14:59,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:59,875 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:14:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:14:59,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-04-07 00:14:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:14:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488652872] [2022-04-07 00:14:59,876 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:14:59,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 2 times [2022-04-07 00:14:59,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:14:59,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101767128] [2022-04-07 00:14:59,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:14:59,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:14:59,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:14:59,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452992375] [2022-04-07 00:14:59,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:14:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:14:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:14:59,894 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:14:59,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:14:59,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:14:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:14:59,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-07 00:14:59,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:15:00,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:15:00,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101767128] [2022-04-07 00:15:00,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452992375] [2022-04-07 00:15:00,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452992375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:00,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:00,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:15:00,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:00,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488652872] [2022-04-07 00:15:00,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488652872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:00,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:00,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-07 00:15:00,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726910365] [2022-04-07 00:15:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:00,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-07 00:15:00,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-07 00:15:00,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:15:00,033 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:00,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:00,130 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-04-07 00:15:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-07 00:15:00,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-07 00:15:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:00,132 INFO L225 Difference]: With dead ends: 43 [2022-04-07 00:15:00,132 INFO L226 Difference]: Without dead ends: 36 [2022-04-07 00:15:00,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:15:00,141 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:00,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:15:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-07 00:15:00,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-04-07 00:15:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:15:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-07 00:15:00,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-04-07 00:15:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:00,147 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-07 00:15:00,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-07 00:15:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-07 00:15:00,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:00,148 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:00,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:00,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-07 00:15:00,356 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-04-07 00:15:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:00,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178966988] [2022-04-07 00:15:00,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:00,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 2 times [2022-04-07 00:15:00,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:00,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824348202] [2022-04-07 00:15:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:00,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:00,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:00,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782720561] [2022-04-07 00:15:00,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:15:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:00,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:00,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:15:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:15:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-07 00:15:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:01,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:15:01,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:15:08,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824348202] [2022-04-07 00:15:08,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:08,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782720561] [2022-04-07 00:15:08,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782720561] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:15:08,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:15:08,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2022-04-07 00:15:08,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178966988] [2022-04-07 00:15:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178966988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:08,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:08,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-07 00:15:08,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966226275] [2022-04-07 00:15:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:08,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-07 00:15:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-07 00:15:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:15:08,644 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:09,855 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-07 00:15:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-07 00:15:09,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-07 00:15:09,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:09,857 INFO L225 Difference]: With dead ends: 47 [2022-04-07 00:15:09,857 INFO L226 Difference]: Without dead ends: 45 [2022-04-07 00:15:09,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:15:09,858 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:09,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-07 00:15:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-07 00:15:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-04-07 00:15:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:15:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-04-07 00:15:09,865 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 37 [2022-04-07 00:15:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:09,865 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-04-07 00:15:09,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:09,865 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-04-07 00:15:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-07 00:15:09,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:09,866 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:09,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:10,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:10,076 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2022-04-07 00:15:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856347317] [2022-04-07 00:15:10,077 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 2 times [2022-04-07 00:15:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:10,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027810382] [2022-04-07 00:15:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:10,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:10,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313544158] [2022-04-07 00:15:10,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:15:10,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:10,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:10,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:10,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:15:10,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:15:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:10,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-07 00:15:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:15:14,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:15:15,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027810382] [2022-04-07 00:15:15,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:15,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313544158] [2022-04-07 00:15:15,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313544158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:15,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:15,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-07 00:15:15,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:15,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856347317] [2022-04-07 00:15:15,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856347317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:15,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:15,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:15:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928008065] [2022-04-07 00:15:15,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:15,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:15:15,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:15:15,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:15:15,063 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:15,309 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-04-07 00:15:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:15:15,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-04-07 00:15:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:15,313 INFO L225 Difference]: With dead ends: 61 [2022-04-07 00:15:15,313 INFO L226 Difference]: Without dead ends: 54 [2022-04-07 00:15:15,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-07 00:15:15,314 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:15,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 113 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:15:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-07 00:15:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-04-07 00:15:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:15:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-04-07 00:15:15,321 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 37 [2022-04-07 00:15:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:15,321 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-04-07 00:15:15,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:15:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-04-07 00:15:15,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-07 00:15:15,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:15,322 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:15,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:15,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:15,541 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2022-04-07 00:15:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:15,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [537812103] [2022-04-07 00:15:15,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 2 times [2022-04-07 00:15:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:15,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65349983] [2022-04-07 00:15:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:15,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:15,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102593829] [2022-04-07 00:15:15,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:15:15,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:15,554 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:15,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:15:15,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:15:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:15:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:15:15,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:15:15,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65349983] [2022-04-07 00:15:15,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102593829] [2022-04-07 00:15:15,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102593829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:15,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:15,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-07 00:15:15,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [537812103] [2022-04-07 00:15:15,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [537812103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:15,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:15,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:15:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502336165] [2022-04-07 00:15:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:15,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:15:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:15:15,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:15:15,810 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:15:17,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:15:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:17,876 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-04-07 00:15:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:15:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-04-07 00:15:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:17,876 INFO L225 Difference]: With dead ends: 59 [2022-04-07 00:15:17,877 INFO L226 Difference]: Without dead ends: 52 [2022-04-07 00:15:17,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:15:17,877 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:17,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 120 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-04-07 00:15:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-07 00:15:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-04-07 00:15:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:15:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-04-07 00:15:17,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2022-04-07 00:15:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:17,884 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-04-07 00:15:17,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:15:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-04-07 00:15:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:15:17,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:17,885 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:17,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:18,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:18,097 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:18,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 1 times [2022-04-07 00:15:18,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:18,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487617086] [2022-04-07 00:15:18,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:18,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 2 times [2022-04-07 00:15:18,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:18,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439992256] [2022-04-07 00:15:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:18,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:18,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:18,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288260558] [2022-04-07 00:15:18,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:15:18,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:18,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:18,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:18,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:15:18,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:15:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-07 00:15:18,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-07 00:15:19,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-07 00:15:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439992256] [2022-04-07 00:15:20,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:20,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288260558] [2022-04-07 00:15:20,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288260558] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:20,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:20,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-04-07 00:15:20,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487617086] [2022-04-07 00:15:20,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487617086] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:20,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:20,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:15:20,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642714496] [2022-04-07 00:15:20,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:20,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:15:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:15:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:15:20,708 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-07 00:15:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:21,314 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-04-07 00:15:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-07 00:15:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-04-07 00:15:21,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:21,316 INFO L225 Difference]: With dead ends: 67 [2022-04-07 00:15:21,316 INFO L226 Difference]: Without dead ends: 65 [2022-04-07 00:15:21,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:15:21,316 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:21,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 218 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-07 00:15:21,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-07 00:15:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-04-07 00:15:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:15:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-04-07 00:15:21,325 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 46 [2022-04-07 00:15:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:21,325 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-04-07 00:15:21,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-07 00:15:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-04-07 00:15:21,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:15:21,326 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:21,326 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:21,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:21,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:21,539 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:21,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 3 times [2022-04-07 00:15:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:21,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954016898] [2022-04-07 00:15:21,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:21,540 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 4 times [2022-04-07 00:15:21,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:21,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568839892] [2022-04-07 00:15:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:21,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:21,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:21,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602842908] [2022-04-07 00:15:21,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:15:21,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:21,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:21,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:21,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:15:21,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:15:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-07 00:15:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:15:22,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:15:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568839892] [2022-04-07 00:15:23,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602842908] [2022-04-07 00:15:23,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602842908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:23,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:23,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-04-07 00:15:23,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954016898] [2022-04-07 00:15:23,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954016898] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:23,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:23,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-07 00:15:23,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352298933] [2022-04-07 00:15:23,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:23,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-07 00:15:23,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-07 00:15:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:15:23,328 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:15:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:23,628 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-04-07 00:15:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:15:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-04-07 00:15:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:23,630 INFO L225 Difference]: With dead ends: 84 [2022-04-07 00:15:23,630 INFO L226 Difference]: Without dead ends: 65 [2022-04-07 00:15:23,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:15:23,630 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:23,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 167 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:15:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-07 00:15:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-07 00:15:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:15:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-04-07 00:15:23,638 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2022-04-07 00:15:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:23,639 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-04-07 00:15:23,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:15:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-04-07 00:15:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-07 00:15:23,640 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:23,640 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:23,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:23,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:23,855 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1779207736, now seen corresponding path program 3 times [2022-04-07 00:15:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727487400] [2022-04-07 00:15:23,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1779207736, now seen corresponding path program 4 times [2022-04-07 00:15:23,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:23,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051688691] [2022-04-07 00:15:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:23,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:23,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648048041] [2022-04-07 00:15:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:15:23,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:23,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:23,876 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) [2022-04-07 00:15:23,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-07 00:15:23,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:15:23,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:23,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-07 00:15:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-07 00:15:26,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-07 00:15:30,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:30,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051688691] [2022-04-07 00:15:30,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:30,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648048041] [2022-04-07 00:15:30,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648048041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:30,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:30,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2022-04-07 00:15:30,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:30,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727487400] [2022-04-07 00:15:30,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727487400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:30,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:30,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-07 00:15:30,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225881298] [2022-04-07 00:15:30,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:30,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-07 00:15:30,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:30,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-07 00:15:30,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:15:30,768 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-07 00:15:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:31,055 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-04-07 00:15:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:15:31,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-04-07 00:15:31,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:31,056 INFO L225 Difference]: With dead ends: 76 [2022-04-07 00:15:31,056 INFO L226 Difference]: Without dead ends: 74 [2022-04-07 00:15:31,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-04-07 00:15:31,057 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:31,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 146 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:15:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-07 00:15:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2022-04-07 00:15:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:15:31,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-04-07 00:15:31,067 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 46 [2022-04-07 00:15:31,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:31,067 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-04-07 00:15:31,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-07 00:15:31,068 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-04-07 00:15:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:15:31,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:31,068 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:31,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:31,273 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,SelfDestructingSolverStorable8 [2022-04-07 00:15:31,273 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:31,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 5 times [2022-04-07 00:15:31,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:31,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917321484] [2022-04-07 00:15:31,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 6 times [2022-04-07 00:15:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:31,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801539811] [2022-04-07 00:15:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:31,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:31,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:31,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796079980] [2022-04-07 00:15:31,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:15:31,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:31,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:31,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:31,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-07 00:15:31,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-07 00:15:31,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-07 00:15:31,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:35,712 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:15:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-07 00:15:38,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-07 00:15:42,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801539811] [2022-04-07 00:15:42,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796079980] [2022-04-07 00:15:42,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796079980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:42,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:42,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-04-07 00:15:42,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917321484] [2022-04-07 00:15:42,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917321484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:42,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:42,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:15:42,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95026520] [2022-04-07 00:15:42,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:42,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:15:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:15:42,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=239, Unknown=3, NotChecked=0, Total=306 [2022-04-07 00:15:42,705 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:15:44,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:15:50,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:15:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:51,849 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2022-04-07 00:15:51,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-07 00:15:51,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-04-07 00:15:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:51,850 INFO L225 Difference]: With dead ends: 94 [2022-04-07 00:15:51,850 INFO L226 Difference]: Without dead ends: 53 [2022-04-07 00:15:51,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=110, Invalid=393, Unknown=3, NotChecked=0, Total=506 [2022-04-07 00:15:51,851 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:51,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 202 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 9 Unchecked, 3.4s Time] [2022-04-07 00:15:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-07 00:15:51,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-07 00:15:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 38 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:15:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-04-07 00:15:51,862 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 55 [2022-04-07 00:15:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:51,862 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-04-07 00:15:51,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:15:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-04-07 00:15:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-07 00:15:51,866 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:15:51,866 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:15:51,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:52,067 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-07 00:15:52,067 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:15:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:15:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 179886322, now seen corresponding path program 7 times [2022-04-07 00:15:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:52,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995298368] [2022-04-07 00:15:52,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:15:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash 179886322, now seen corresponding path program 8 times [2022-04-07 00:15:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:15:52,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269957673] [2022-04-07 00:15:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:15:52,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:15:52,074 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:15:52,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069926822] [2022-04-07 00:15:52,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:15:52,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:15:52,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:15:52,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-07 00:15:52,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-07 00:15:52,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:15:52,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:15:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-07 00:15:52,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:15:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:15:53,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:15:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-07 00:15:54,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:15:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269957673] [2022-04-07 00:15:54,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:15:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069926822] [2022-04-07 00:15:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069926822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:15:54,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:15:54,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 23 [2022-04-07 00:15:54,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:15:54,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995298368] [2022-04-07 00:15:54,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995298368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:15:54,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:15:54,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:15:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7700904] [2022-04-07 00:15:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:15:54,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:15:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:15:54,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:15:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-04-07 00:15:54,741 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-07 00:15:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:15:54,993 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-04-07 00:15:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-07 00:15:54,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2022-04-07 00:15:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:15:54,994 INFO L225 Difference]: With dead ends: 62 [2022-04-07 00:15:54,994 INFO L226 Difference]: Without dead ends: 0 [2022-04-07 00:15:54,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-04-07 00:15:54,995 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:15:54,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 164 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:15:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-07 00:15:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-07 00:15:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-07 00:15:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-07 00:15:54,996 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2022-04-07 00:15:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:15:54,996 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-07 00:15:54,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 7 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-04-07 00:15:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-07 00:15:54,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 00:15:54,998 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:15:55,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-07 00:15:55,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-07 00:15:55,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-07 00:16:16,802 WARN L232 SmtUtils]: Spent 21.12s on a formula simplification. DAG size of input: 107 DAG size of output: 25 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:16:52,009 WARN L232 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 96 DAG size of output: 26 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:16:52,041 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 6) no Hoare annotation was computed. [2022-04-07 00:16:52,041 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 6) no Hoare annotation was computed. [2022-04-07 00:16:52,041 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 6) no Hoare annotation was computed. [2022-04-07 00:16:52,041 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point L10(line 10) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 9 11) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 main_~a~0) (<= main_~a~0 5)) [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~b~0 5) (<= 0 main_~a~0) (<= 0 main_~b~0) (<= main_~a~0 5)) [2022-04-07 00:16:52,041 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-04-07 00:16:52,041 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 20 49) the Hoare annotation is: true [2022-04-07 00:16:52,041 INFO L878 garLoopResultBuilder]: At program point L25-1(line 25) the Hoare annotation is: (and (<= 0 main_~a~0) (<= main_~a~0 5)) [2022-04-07 00:16:52,041 INFO L885 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-04-07 00:16:52,041 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 20 49) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0)) (.cse1 (<= main_~b~0 5))) (or (and (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse0) .cse1 (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) (= (mod main_~x~0 2) 0)) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) .cse1 (= main_~b~0 main_~y~0) (<= 0 main_~a~0) (<= 1 main_~y~0) (<= main_~a~0 5) (= main_~a~0 main_~x~0)))) [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= main_~z~0 .cse0) (<= 1 main_~b~0) (or (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0) (= .cse0 (+ (* main_~x~0 2) (* 2 (* (div main_~y~0 2) main_~x~0)) main_~z~0))))) [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (and (<= main_~b~0 5) (<= 0 main_~a~0) (<= 1 main_~b~0) (<= main_~a~0 5)) [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L39(lines 39 42) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (not (= main_~y~0 0)) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= main_~b~0 5) (= (mod (+ (* (- 1) main_~z~0) .cse0) main_~y~0) 0) (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)))) [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L39-2(lines 39 42) the Hoare annotation is: (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 1)) (<= main_~b~0 5) (<= 1 main_~b~0) (< 0 (+ main_~y~0 1))) [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0)) (.cse1 (<= main_~b~0 5))) (or (and (= (+ main_~z~0 (* 2 (* (div (* (- 1) main_~x~0) (- 2)) main_~y~0))) .cse0) .cse1 (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)) (= (mod main_~x~0 2) 0)) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) .cse1 (= main_~b~0 main_~y~0) (<= 0 main_~a~0) (<= 1 main_~y~0) (<= main_~a~0 5) (= main_~a~0 main_~x~0)))) [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 45) the Hoare annotation is: (let ((.cse0 (* main_~b~0 main_~a~0))) (and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) .cse0) (<= main_~b~0 5) (or (= main_~z~0 .cse0) (= (mod (+ (* (- 1) main_~z~0) .cse0) main_~y~0) 0)) (<= 1 main_~b~0) (< 0 (+ main_~y~0 1)))) [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:16:52,042 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-04-07 00:16:52,043 INFO L878 garLoopResultBuilder]: At program point L14(lines 14 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:16:52,043 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:16:52,043 INFO L878 garLoopResultBuilder]: At program point L13-2(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:16:52,043 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 12 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:16:52,043 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:16:52,045 INFO L719 BasicCegarLoop]: Path program histogram: [8, 4, 2, 2, 2, 2, 2] [2022-04-07 00:16:52,046 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 00:16:52,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 12:16:52 BoogieIcfgContainer [2022-04-07 00:16:52,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 00:16:52,057 INFO L158 Benchmark]: Toolchain (without parser) took 113580.48ms. Allocated memory was 222.3MB in the beginning and 296.7MB in the end (delta: 74.4MB). Free memory was 170.2MB in the beginning and 185.6MB in the end (delta: -15.4MB). Peak memory consumption was 142.2MB. Max. memory is 8.0GB. [2022-04-07 00:16:52,057 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 222.3MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:16:52,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 167.22ms. Allocated memory is still 222.3MB. Free memory was 169.9MB in the beginning and 198.6MB in the end (delta: -28.7MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. [2022-04-07 00:16:52,057 INFO L158 Benchmark]: Boogie Preprocessor took 24.36ms. Allocated memory is still 222.3MB. Free memory was 198.6MB in the beginning and 197.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-07 00:16:52,057 INFO L158 Benchmark]: RCFGBuilder took 187.33ms. Allocated memory is still 222.3MB. Free memory was 197.0MB in the beginning and 186.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-07 00:16:52,057 INFO L158 Benchmark]: TraceAbstraction took 113197.16ms. Allocated memory was 222.3MB in the beginning and 296.7MB in the end (delta: 74.4MB). Free memory was 186.5MB in the beginning and 185.6MB in the end (delta: 817.0kB). Peak memory consumption was 157.5MB. Max. memory is 8.0GB. [2022-04-07 00:16:52,058 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 222.3MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 167.22ms. Allocated memory is still 222.3MB. Free memory was 169.9MB in the beginning and 198.6MB in the end (delta: -28.7MB). Peak memory consumption was 12.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.36ms. Allocated memory is still 222.3MB. Free memory was 198.6MB in the beginning and 197.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 187.33ms. Allocated memory is still 222.3MB. Free memory was 197.0MB in the beginning and 186.9MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 113197.16ms. Allocated memory was 222.3MB in the beginning and 296.7MB in the end (delta: 74.4MB). Free memory was 186.5MB in the beginning and 185.6MB in the end (delta: 817.0kB). Peak memory consumption was 157.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 113.1s, OverallIterations: 11, TraceHistogramMax: 4, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 14.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 56.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 215 SdHoareTripleChecker+Valid, 8.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 195 mSDsluCounter, 1456 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 1184 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1719 IncrementalHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 272 mSDtfsCounter, 1719 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 645 SyntacticMatches, 15 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 26.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=8, InterpolantAutomatonStates: 116, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 33 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 150 PreInvPairs, 244 NumberOfFragments, 369 HoareAnnotationTreeSize, 150 FomulaSimplifications, 663 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 32 FomulaSimplificationsInter, 19317 FormulaSimplificationTreeSizeReductionInter, 56.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((z + 2 * (-1 * x / -2 * y) == b * a && b <= 5) && 1 <= b) && 0 < y + 1) && x % 2 == 0) || ((((((z + y * x == b * a && b <= 5) && b == y) && 0 <= a) && 1 <= y) && a <= 5) && a == x) - ProcedureContractResult [Line: 9]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 20]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 12]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-07 00:16:52,102 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...