/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/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:25:57,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:25:57,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:25:57,747 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:25:57,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:25:57,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:25:57,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:25:57,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:25:57,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:25:57,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:25:57,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:25:57,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:25:57,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:25:57,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:25:57,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:25:57,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:25:57,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:25:57,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:25:57,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:25:57,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:25:57,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:25:57,803 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:25:57,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:25:57,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:25:58,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:25:58,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:25:58,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:25:58,009 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:25:58,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 19:25:58,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4911f6ccd/436c34ceeeda4925947551188414e935/FLAGbf0b7dec9 [2022-03-20 19:25:58,402 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:25:58,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-03-20 19:25:58,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4911f6ccd/436c34ceeeda4925947551188414e935/FLAGbf0b7dec9 [2022-03-20 19:25:58,415 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4911f6ccd/436c34ceeeda4925947551188414e935 [2022-03-20 19:25:58,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:25:58,417 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:25:58,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:25:58,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:25:58,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:25:58,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be2aef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58, skipping insertion in model container [2022-03-20 19:25:58,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:25:58,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:25:58,560 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/egcd3-ll.c[490,503] [2022-03-20 19:25:58,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:25:58,596 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:25:58,606 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/egcd3-ll.c[490,503] [2022-03-20 19:25:58,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:25:58,623 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:25:58,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58 WrapperNode [2022-03-20 19:25:58,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:25:58,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:25:58,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:25:58,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:25:58,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:25:58,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:25:58,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:25:58,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:25:58,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (1/1) ... [2022-03-20 19:25:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:25:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:25:58,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 19:25:58,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:25:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:25:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:25:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:25:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:25:58,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:25:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:25:58,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:25:58,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:25:58,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:25:58,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:25:58,793 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:25:58,794 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:25:58,880 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:25:58,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:25:58,885 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 19:25:58,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:25:58 BoogieIcfgContainer [2022-03-20 19:25:58,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:25:58,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:25:58,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:25:58,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:25:58,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:25:58" (1/3) ... [2022-03-20 19:25:58,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaa84de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:25:58, skipping insertion in model container [2022-03-20 19:25:58,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:25:58" (2/3) ... [2022-03-20 19:25:58,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aaa84de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:25:58, skipping insertion in model container [2022-03-20 19:25:58,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:25:58" (3/3) ... [2022-03-20 19:25:58,905 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-03-20 19:25:58,909 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:25:58,909 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:25:58,939 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:25:58,943 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 [2022-03-20 19:25:58,943 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:25:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 19:25:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 19:25:58,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:58,959 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:58,959 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-03-20 19:25:58,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:58,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [489690476] [2022-03-20 19:25:58,978 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:25:58,978 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 2 times [2022-03-20 19:25:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:58,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083129658] [2022-03-20 19:25:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:25:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:25:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:59,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:25:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:25:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:25:59,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:59,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083129658] [2022-03-20 19:25:59,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083129658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:59,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:59,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:25:59,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:59,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [489690476] [2022-03-20 19:25:59,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [489690476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:59,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:59,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:25:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919538006] [2022-03-20 19:25:59,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:59,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:25:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:25:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:25:59,117 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:25:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:59,167 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-03-20 19:25:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:25:59,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 19:25:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:59,176 INFO L225 Difference]: With dead ends: 67 [2022-03-20 19:25:59,176 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 19:25:59,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:25:59,181 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:59,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:25:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 19:25:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 19:25:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 19:25:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-03-20 19:25:59,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-03-20 19:25:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:59,212 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-03-20 19:25:59,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:25:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-03-20 19:25:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 19:25:59,213 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:59,213 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:59,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:25:59,213 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:59,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:59,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-03-20 19:25:59,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:59,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882880719] [2022-03-20 19:25:59,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:25:59,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 2 times [2022-03-20 19:25:59,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:59,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848383080] [2022-03-20 19:25:59,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:59,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:59,228 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:25:59,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519383379] [2022-03-20 19:25:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:25:59,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:25:59,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:25:59,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:25:59,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 19:25:59,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:25:59,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:25:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 19:25:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:25:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:25:59,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:25:59,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848383080] [2022-03-20 19:25:59,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:25:59,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519383379] [2022-03-20 19:25:59,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519383379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:59,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:59,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:59,468 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:59,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882880719] [2022-03-20 19:25:59,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882880719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:59,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:59,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:25:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939050154] [2022-03-20 19:25:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:59,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:25:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:25:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:25:59,470 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:25:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:25:59,533 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-03-20 19:25:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:25:59,534 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 19:25:59,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:25:59,535 INFO L225 Difference]: With dead ends: 51 [2022-03-20 19:25:59,535 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 19:25:59,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:25:59,536 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:25:59,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 162 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:25:59,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 19:25:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 19:25:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 19:25:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-03-20 19:25:59,546 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-03-20 19:25:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:25:59,546 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-03-20 19:25:59,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:25:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-03-20 19:25:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 19:25:59,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:25:59,547 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:25:59,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 19:25:59,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:25:59,763 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:25:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:25:59,764 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-03-20 19:25:59,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:59,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114540108] [2022-03-20 19:25:59,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:25:59,765 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 2 times [2022-03-20 19:25:59,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:25:59,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561108215] [2022-03-20 19:25:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:25:59,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:25:59,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:25:59,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255240985] [2022-03-20 19:25:59,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:25:59,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:25:59,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:25:59,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:25:59,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 19:25:59,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:25:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:25:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:25:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:25:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 19:25:59,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:25:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 19:25:59,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:25:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561108215] [2022-03-20 19:25:59,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:25:59,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255240985] [2022-03-20 19:25:59,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255240985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:25:59,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:25:59,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 19:25:59,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:25:59,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114540108] [2022-03-20 19:25:59,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114540108] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:25:59,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:25:59,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:25:59,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226440605] [2022-03-20 19:25:59,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:25:59,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:25:59,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:25:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:25:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:25:59,978 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:26:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:00,082 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-03-20 19:26:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:26:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-03-20 19:26:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:00,083 INFO L225 Difference]: With dead ends: 100 [2022-03-20 19:26:00,083 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 19:26:00,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:26:00,085 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:00,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 259 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 19:26:00,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-03-20 19:26:00,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 19:26:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-03-20 19:26:00,098 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-03-20 19:26:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:00,098 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-03-20 19:26:00,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:26:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-03-20 19:26:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 19:26:00,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:00,099 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:00,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:00,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 19:26:00,313 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:00,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-03-20 19:26:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:00,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567308239] [2022-03-20 19:26:00,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:00,315 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 2 times [2022-03-20 19:26:00,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:00,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479200771] [2022-03-20 19:26:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:00,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:00,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751238584] [2022-03-20 19:26:00,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:00,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:00,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:00,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:00,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 19:26:00,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:00,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 19:26:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 19:26:00,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:26:00,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479200771] [2022-03-20 19:26:00,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751238584] [2022-03-20 19:26:00,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751238584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:00,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:00,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-03-20 19:26:00,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:00,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567308239] [2022-03-20 19:26:00,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567308239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:00,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:00,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:26:00,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965125689] [2022-03-20 19:26:00,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:00,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:26:00,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:00,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:26:00,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:26:00,743 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:26:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:00,884 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2022-03-20 19:26:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:26:00,884 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-20 19:26:00,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:00,885 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:26:00,885 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:26:00,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:26:00,887 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:00,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 339 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:26:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-20 19:26:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 19:26:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-03-20 19:26:00,904 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-03-20 19:26:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:00,904 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-03-20 19:26:00,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 19:26:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-03-20 19:26:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:26:00,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:00,905 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-03-20 19:26:00,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:01,122 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:01,122 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-03-20 19:26:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:01,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558256543] [2022-03-20 19:26:01,123 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 2 times [2022-03-20 19:26:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:01,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954895723] [2022-03-20 19:26:01,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:01,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:01,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:01,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76813534] [2022-03-20 19:26:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:01,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:01,169 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:01,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 19:26:01,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:01,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 19:26:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 19:26:01,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:26:01,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954895723] [2022-03-20 19:26:01,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76813534] [2022-03-20 19:26:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76813534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:01,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:01,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:26:01,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558256543] [2022-03-20 19:26:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558256543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:01,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:26:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243699844] [2022-03-20 19:26:01,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:01,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:26:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:01,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:26:01,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:26:01,304 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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) [2022-03-20 19:26:01,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:01,389 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-03-20 19:26:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:26:01,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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 36 [2022-03-20 19:26:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:01,390 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:26:01,390 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:26:01,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:26:01,391 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:01,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 214 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:01,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:26:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-20 19:26:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 19:26:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-03-20 19:26:01,404 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2022-03-20 19:26:01,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:01,405 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-03-20 19:26:01,405 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 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) [2022-03-20 19:26:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-03-20 19:26:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:26:01,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:01,406 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:01,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:01,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:01,618 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:01,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-03-20 19:26:01,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:01,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [589234155] [2022-03-20 19:26:01,619 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:01,619 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 2 times [2022-03-20 19:26:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:01,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985428512] [2022-03-20 19:26:01,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:01,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967167193] [2022-03-20 19:26:01,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:01,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:01,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:01,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:01,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 19:26:01,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:01,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:01,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 19:26:01,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 19:26:01,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:01,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:26:01,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985428512] [2022-03-20 19:26:01,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:01,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967167193] [2022-03-20 19:26:01,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967167193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:01,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:01,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 19:26:01,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [589234155] [2022-03-20 19:26:01,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [589234155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:01,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:01,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:26:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851328313] [2022-03-20 19:26:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:01,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:26:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:26:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:26:01,986 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 19:26:02,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:02,142 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-03-20 19:26:02,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:26:02,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-03-20 19:26:02,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:02,143 INFO L225 Difference]: With dead ends: 121 [2022-03-20 19:26:02,143 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 19:26:02,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:26:02,144 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:02,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 304 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 19:26:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-03-20 19:26:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 79 states have internal predecessors, (97), 29 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 19:26:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2022-03-20 19:26:02,156 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2022-03-20 19:26:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:02,156 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2022-03-20 19:26:02,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 19:26:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2022-03-20 19:26:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:26:02,157 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:02,157 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-03-20 19:26:02,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:02,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:02,372 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 3 times [2022-03-20 19:26:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235801870] [2022-03-20 19:26:02,373 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 4 times [2022-03-20 19:26:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:02,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420112209] [2022-03-20 19:26:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:02,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:02,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726424477] [2022-03-20 19:26:02,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:26:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:02,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:02,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 19:26:02,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:26:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 19:26:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 19:26:02,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:26:02,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420112209] [2022-03-20 19:26:02,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726424477] [2022-03-20 19:26:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726424477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:02,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:02,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:02,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:02,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235801870] [2022-03-20 19:26:02,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235801870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:02,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:02,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:02,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882651315] [2022-03-20 19:26:02,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:02,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:26:02,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:02,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:26:02,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:26:02,500 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:26:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:02,551 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-03-20 19:26:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:26:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-03-20 19:26:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:02,554 INFO L225 Difference]: With dead ends: 165 [2022-03-20 19:26:02,554 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 19:26:02,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:26:02,555 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:02,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:26:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 19:26:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-03-20 19:26:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 19:26:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-03-20 19:26:02,577 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2022-03-20 19:26:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:02,578 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-03-20 19:26:02,578 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 19:26:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-03-20 19:26:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 19:26:02,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:02,582 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2022-03-20 19:26:02,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:02,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:02,798 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-03-20 19:26:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546709855] [2022-03-20 19:26:02,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 2 times [2022-03-20 19:26:02,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776772416] [2022-03-20 19:26:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:02,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:02,806 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:02,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330973763] [2022-03-20 19:26:02,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:02,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:02,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:02,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:02,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 19:26:02,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:02,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:02,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:26:02,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 19:26:02,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:26:02,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776772416] [2022-03-20 19:26:02,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:02,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330973763] [2022-03-20 19:26:02,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330973763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:02,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:02,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:02,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:02,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546709855] [2022-03-20 19:26:02,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546709855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:02,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:02,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:02,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264425471] [2022-03-20 19:26:02,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:02,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:26:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:02,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:26:02,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:26:02,925 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:26:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:02,974 INFO L93 Difference]: Finished difference Result 151 states and 206 transitions. [2022-03-20 19:26:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:26:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-03-20 19:26:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:02,975 INFO L225 Difference]: With dead ends: 151 [2022-03-20 19:26:02,975 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 19:26:02,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:26:02,976 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:02,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 142 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:26:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 19:26:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2022-03-20 19:26:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 81 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 19:26:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2022-03-20 19:26:02,989 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2022-03-20 19:26:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:02,989 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2022-03-20 19:26:02,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 19:26:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2022-03-20 19:26:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 19:26:02,989 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:02,990 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:03,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:03,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:03,206 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 1 times [2022-03-20 19:26:03,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:03,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [511064829] [2022-03-20 19:26:03,207 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 2 times [2022-03-20 19:26:03,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:03,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233479699] [2022-03-20 19:26:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:03,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:03,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:03,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310862005] [2022-03-20 19:26:03,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:03,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:03,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:03,224 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:03,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 19:26:03,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:03,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 19:26:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 19:26:03,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 19:26:03,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233479699] [2022-03-20 19:26:03,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310862005] [2022-03-20 19:26:03,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310862005] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:26:03,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:26:03,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-03-20 19:26:03,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [511064829] [2022-03-20 19:26:03,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [511064829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:03,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:03,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026611651] [2022-03-20 19:26:03,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:03,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:26:03,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:26:03,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:26:03,450 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:26:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:03,492 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-03-20 19:26:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:26:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-03-20 19:26:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:03,494 INFO L225 Difference]: With dead ends: 173 [2022-03-20 19:26:03,494 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 19:26:03,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:26:03,495 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 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 [2022-03-20 19:26:03,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:26:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 19:26:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-03-20 19:26:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 19:26:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-03-20 19:26:03,513 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 41 [2022-03-20 19:26:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:03,513 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-03-20 19:26:03,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:26:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-03-20 19:26:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 19:26:03,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:03,514 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:03,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:03,735 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 [2022-03-20 19:26:03,735 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-03-20 19:26:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1940930341] [2022-03-20 19:26:03,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 2 times [2022-03-20 19:26:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:03,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417733197] [2022-03-20 19:26:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:03,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:03,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807934019] [2022-03-20 19:26:03,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:03,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:03,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:03,755 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) [2022-03-20 19:26:03,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 19:26:03,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 19:26:03,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 19:26:04,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 19:26:04,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:04,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417733197] [2022-03-20 19:26:04,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:04,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807934019] [2022-03-20 19:26:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807934019] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:04,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:04,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 19:26:04,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:04,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1940930341] [2022-03-20 19:26:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1940930341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:04,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:04,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:26:04,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392216050] [2022-03-20 19:26:04,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:04,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:26:04,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:04,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:26:04,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:26:04,795 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 19:26:05,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:05,184 INFO L93 Difference]: Finished difference Result 230 states and 330 transitions. [2022-03-20 19:26:05,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:26:05,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-03-20 19:26:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:05,186 INFO L225 Difference]: With dead ends: 230 [2022-03-20 19:26:05,186 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 19:26:05,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:26:05,191 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:05,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 342 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:26:05,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 19:26:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-20 19:26:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 117 states have (on average 1.188034188034188) internal successors, (139), 128 states have internal predecessors, (139), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 81 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 19:26:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 323 transitions. [2022-03-20 19:26:05,256 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 323 transitions. Word has length 53 [2022-03-20 19:26:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:05,256 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 323 transitions. [2022-03-20 19:26:05,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-20 19:26:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 323 transitions. [2022-03-20 19:26:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 19:26:05,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:05,257 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:05,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:05,476 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 [2022-03-20 19:26:05,476 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 3 times [2022-03-20 19:26:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869500246] [2022-03-20 19:26:05,477 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:05,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 4 times [2022-03-20 19:26:05,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015369336] [2022-03-20 19:26:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:05,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:05,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590936116] [2022-03-20 19:26:05,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:26:05,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:05,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:05,485 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) [2022-03-20 19:26:05,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 19:26:05,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:26:05,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 19:26:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 19:26:05,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 19:26:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015369336] [2022-03-20 19:26:05,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590936116] [2022-03-20 19:26:05,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590936116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:05,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:05,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-20 19:26:05,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869500246] [2022-03-20 19:26:05,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869500246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:05,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:05,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:26:05,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23796574] [2022-03-20 19:26:05,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:05,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:26:05,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:05,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:26:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:26:05,686 INFO L87 Difference]: Start difference. First operand 224 states and 323 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:05,937 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2022-03-20 19:26:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:26:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2022-03-20 19:26:05,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:05,940 INFO L225 Difference]: With dead ends: 335 [2022-03-20 19:26:05,940 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 19:26:05,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:26:05,941 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:05,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 359 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 19:26:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 243. [2022-03-20 19:26:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 143 states have internal predecessors, (166), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 19:26:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 350 transitions. [2022-03-20 19:26:05,969 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 350 transitions. Word has length 58 [2022-03-20 19:26:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:05,969 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 350 transitions. [2022-03-20 19:26:05,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 350 transitions. [2022-03-20 19:26:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:26:05,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:05,971 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:06,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:06,187 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 [2022-03-20 19:26:06,187 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-03-20 19:26:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:06,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700810760] [2022-03-20 19:26:06,188 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:06,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 2 times [2022-03-20 19:26:06,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869421265] [2022-03-20 19:26:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:06,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:06,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:06,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717622507] [2022-03-20 19:26:06,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:06,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:06,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:06,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:06,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 19:26:06,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:06,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 19:26:06,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 19:26:06,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 19:26:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869421265] [2022-03-20 19:26:06,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717622507] [2022-03-20 19:26:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717622507] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:26:06,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:26:06,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-20 19:26:06,530 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700810760] [2022-03-20 19:26:06,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700810760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:06,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:06,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730776390] [2022-03-20 19:26:06,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:06,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:26:06,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:06,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:26:06,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:26:06,531 INFO L87 Difference]: Start difference. First operand 243 states and 350 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:06,630 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-03-20 19:26:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:26:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2022-03-20 19:26:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:06,633 INFO L225 Difference]: With dead ends: 249 [2022-03-20 19:26:06,633 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 19:26:06,634 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:26:06,635 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:06,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 125 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 19:26:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-03-20 19:26:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 146 states have internal predecessors, (169), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 19:26:06,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 353 transitions. [2022-03-20 19:26:06,684 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 353 transitions. Word has length 63 [2022-03-20 19:26:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:06,685 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 353 transitions. [2022-03-20 19:26:06,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 353 transitions. [2022-03-20 19:26:06,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 19:26:06,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:06,686 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:06,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:06,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 19:26:06,895 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 1 times [2022-03-20 19:26:06,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:06,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [706826542] [2022-03-20 19:26:06,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:06,896 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 2 times [2022-03-20 19:26:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929298698] [2022-03-20 19:26:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:06,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126655459] [2022-03-20 19:26:06,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:06,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:06,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:06,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 19:26:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:06,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:06,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 19:26:06,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:07,049 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 19:26:07,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:07,162 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-20 19:26:07,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929298698] [2022-03-20 19:26:07,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126655459] [2022-03-20 19:26:07,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126655459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:07,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:07,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 19:26:07,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:07,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [706826542] [2022-03-20 19:26:07,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [706826542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:07,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:07,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:26:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447887645] [2022-03-20 19:26:07,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:07,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:26:07,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:07,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:26:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:26:07,164 INFO L87 Difference]: Start difference. First operand 247 states and 353 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:07,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:07,345 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2022-03-20 19:26:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:26:07,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-03-20 19:26:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:07,346 INFO L225 Difference]: With dead ends: 261 [2022-03-20 19:26:07,347 INFO L226 Difference]: Without dead ends: 259 [2022-03-20 19:26:07,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:26:07,347 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:07,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 141 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:26:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-20 19:26:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-03-20 19:26:07,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 148 states have (on average 1.2027027027027026) internal successors, (178), 155 states have internal predecessors, (178), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 19:26:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-03-20 19:26:07,385 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 61 [2022-03-20 19:26:07,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:07,385 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-03-20 19:26:07,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 19:26:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-03-20 19:26:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:26:07,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:07,386 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:07,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 19:26:07,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 19:26:07,616 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 3 times [2022-03-20 19:26:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28123725] [2022-03-20 19:26:07,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 4 times [2022-03-20 19:26:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:07,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946593858] [2022-03-20 19:26:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:07,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:07,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:07,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13631436] [2022-03-20 19:26:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:26:07,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:07,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:07,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:07,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 19:26:07,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:26:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:07,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 19:26:07,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 19:26:07,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:26:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946593858] [2022-03-20 19:26:07,748 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13631436] [2022-03-20 19:26:07,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13631436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:07,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:07,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:07,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28123725] [2022-03-20 19:26:07,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28123725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:07,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:07,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:26:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942654416] [2022-03-20 19:26:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:07,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:26:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:26:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:26:07,749 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 19:26:07,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:07,829 INFO L93 Difference]: Finished difference Result 445 states and 620 transitions. [2022-03-20 19:26:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:26:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-20 19:26:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:07,831 INFO L225 Difference]: With dead ends: 445 [2022-03-20 19:26:07,831 INFO L226 Difference]: Without dead ends: 270 [2022-03-20 19:26:07,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:26:07,833 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:07,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:26:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-20 19:26:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 250. [2022-03-20 19:26:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 148 states have internal predecessors, (176), 85 states have call successors, (85), 18 states have call predecessors, (85), 17 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 19:26:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-03-20 19:26:07,868 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 66 [2022-03-20 19:26:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:07,868 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-03-20 19:26:07,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 19:26:07,869 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-03-20 19:26:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:26:07,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:07,869 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:07,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:08,085 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 19:26:08,086 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:08,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 5 times [2022-03-20 19:26:08,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:08,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694102288] [2022-03-20 19:26:08,086 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 6 times [2022-03-20 19:26:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:08,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136317759] [2022-03-20 19:26:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:08,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612216419] [2022-03-20 19:26:08,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:26:08,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:08,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:08,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:08,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 19:26:08,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:26:08,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 19:26:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:08,716 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 19:26:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:09,959 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-20 19:26:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136317759] [2022-03-20 19:26:13,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612216419] [2022-03-20 19:26:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612216419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:13,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-20 19:26:13,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694102288] [2022-03-20 19:26:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694102288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:13,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:13,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:26:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180153981] [2022-03-20 19:26:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:13,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:26:13,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:13,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:26:13,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:26:13,489 INFO L87 Difference]: Start difference. First operand 250 states and 344 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 19:26:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:14,504 INFO L93 Difference]: Finished difference Result 321 states and 431 transitions. [2022-03-20 19:26:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:26:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-03-20 19:26:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:14,506 INFO L225 Difference]: With dead ends: 321 [2022-03-20 19:26:14,506 INFO L226 Difference]: Without dead ends: 319 [2022-03-20 19:26:14,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:26:14,507 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:14,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 454 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:26:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-20 19:26:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-03-20 19:26:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 182 states have internal predecessors, (215), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 19:26:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2022-03-20 19:26:14,564 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2022-03-20 19:26:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:14,565 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2022-03-20 19:26:14,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-20 19:26:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2022-03-20 19:26:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 19:26:14,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:14,568 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:14,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:14,785 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:14,785 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:14,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 1 times [2022-03-20 19:26:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:14,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071354014] [2022-03-20 19:26:14,786 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 2 times [2022-03-20 19:26:14,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:14,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27972475] [2022-03-20 19:26:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:14,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:14,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:14,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867774059] [2022-03-20 19:26:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:14,794 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:14,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 19:26:14,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:14,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 19:26:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 19 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-20 19:26:15,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:15,792 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:15,794 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:39,702 WARN L232 SmtUtils]: Spent 11.89s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 19:26:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27972475] [2022-03-20 19:26:39,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867774059] [2022-03-20 19:26:39,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867774059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:26:39,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:26:39,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 19:26:39,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:39,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071354014] [2022-03-20 19:26:39,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071354014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:39,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:39,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:26:39,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263790136] [2022-03-20 19:26:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:39,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:26:39,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:26:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:26:39,706 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:26:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:40,323 INFO L93 Difference]: Finished difference Result 388 states and 532 transitions. [2022-03-20 19:26:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 19:26:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2022-03-20 19:26:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:40,325 INFO L225 Difference]: With dead ends: 388 [2022-03-20 19:26:40,326 INFO L226 Difference]: Without dead ends: 385 [2022-03-20 19:26:40,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:26:40,326 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:40,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 334 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:26:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-03-20 19:26:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-03-20 19:26:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 190 states have internal predecessors, (225), 105 states have call successors, (105), 24 states have call predecessors, (105), 23 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 19:26:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2022-03-20 19:26:40,369 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 75 [2022-03-20 19:26:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:40,370 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2022-03-20 19:26:40,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 19:26:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2022-03-20 19:26:40,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 19:26:40,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:40,371 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:40,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:40,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 19:26:40,587 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 3 times [2022-03-20 19:26:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:40,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752098995] [2022-03-20 19:26:40,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:40,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 4 times [2022-03-20 19:26:40,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:40,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906082994] [2022-03-20 19:26:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:40,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:40,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:40,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151589317] [2022-03-20 19:26:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:26:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:40,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:40,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 19:26:40,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:26:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 19:26:40,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-03-20 19:26:41,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:50,684 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* 2 c_main_~d~0))) (or (not (= (* c_main_~b~0 .cse0) (* 2 c_main_~v~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (= (let ((.cse1 (+ .cse0 c_main_~k~0))) (+ (* (+ (* (- 1) c_main_~q~0 .cse1) c_main_~p~0) c_main_~x~0) c_main_~b~0 (* (+ (* (* c_main_~s~0 .cse1) (- 1)) c_main_~r~0) c_main_~y~0))) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~s~0 c_main_~y~0))) (not (= (+ (* (- 2) c_main_~v~0) c_main_~c~0) 0)))) is different from true [2022-03-20 19:26:52,735 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0))) (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ .cse0 .cse1) c_main_~a~0)) (= (+ c_main_~b~0 .cse0 .cse1) (+ (* c_main_~q~0 c_main_~x~0) (* c_main_~q~0 c_main_~x~0 c_main_~k~0) (* (* c_main_~q~0 c_main_~d~0 c_main_~x~0) 2) (* 2 (* c_main_~s~0 c_main_~d~0 c_main_~y~0)) (* c_main_~s~0 c_main_~y~0) (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (not (= c_main_~c~0 (* 2 c_main_~v~0))))) is different from true [2022-03-20 19:26:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 73 trivial. 3 not checked. [2022-03-20 19:26:53,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906082994] [2022-03-20 19:26:53,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:53,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151589317] [2022-03-20 19:26:53,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151589317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:53,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:53,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-03-20 19:26:53,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:53,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752098995] [2022-03-20 19:26:53,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752098995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:53,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:53,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:26:53,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478498354] [2022-03-20 19:26:53,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:53,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:26:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:26:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=547, Unknown=5, NotChecked=98, Total=756 [2022-03-20 19:26:53,177 INFO L87 Difference]: Start difference. First operand 318 states and 433 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 19:26:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:56,344 INFO L93 Difference]: Finished difference Result 406 states and 555 transitions. [2022-03-20 19:26:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:26:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 80 [2022-03-20 19:26:56,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:56,347 INFO L225 Difference]: With dead ends: 406 [2022-03-20 19:26:56,347 INFO L226 Difference]: Without dead ends: 403 [2022-03-20 19:26:56,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=143, Invalid=789, Unknown=6, NotChecked=118, Total=1056 [2022-03-20 19:26:56,348 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:56,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 549 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:26:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-03-20 19:26:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-03-20 19:26:56,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 227 states have internal predecessors, (271), 133 states have call successors, (133), 28 states have call predecessors, (133), 27 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-20 19:26:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 535 transitions. [2022-03-20 19:26:56,409 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 535 transitions. Word has length 80 [2022-03-20 19:26:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:56,409 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 535 transitions. [2022-03-20 19:26:56,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 19:26:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 535 transitions. [2022-03-20 19:26:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 19:26:56,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:56,411 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:56,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:56,630 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 19:26:56,630 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:56,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 1 times [2022-03-20 19:26:56,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:56,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393285809] [2022-03-20 19:26:56,631 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:56,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 2 times [2022-03-20 19:26:56,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:56,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198637420] [2022-03-20 19:26:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:56,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:56,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253536558] [2022-03-20 19:26:56,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:56,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:56,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:56,639 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 19:26:56,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 19:26:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:26:56,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 19:26:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198637420] [2022-03-20 19:26:57,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253536558] [2022-03-20 19:26:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253536558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:57,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 19:26:57,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393285809] [2022-03-20 19:26:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393285809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:57,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:26:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561385973] [2022-03-20 19:26:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:57,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:26:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:26:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:26:57,782 INFO L87 Difference]: Start difference. First operand 387 states and 535 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 19:26:58,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:58,054 INFO L93 Difference]: Finished difference Result 540 states and 774 transitions. [2022-03-20 19:26:58,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:26:58,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-03-20 19:26:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:58,058 INFO L225 Difference]: With dead ends: 540 [2022-03-20 19:26:58,058 INFO L226 Difference]: Without dead ends: 538 [2022-03-20 19:26:58,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:26:58,058 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 21 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:58,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 270 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:26:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-03-20 19:26:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 520. [2022-03-20 19:26:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 287 states have (on average 1.2334494773519165) internal successors, (354), 288 states have internal predecessors, (354), 201 states have call successors, (201), 32 states have call predecessors, (201), 31 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-20 19:26:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 754 transitions. [2022-03-20 19:26:58,152 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 754 transitions. Word has length 83 [2022-03-20 19:26:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:58,152 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 754 transitions. [2022-03-20 19:26:58,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 19:26:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 754 transitions. [2022-03-20 19:26:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 19:26:58,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:58,154 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:58,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 19:26:58,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 19:26:58,371 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 7 times [2022-03-20 19:26:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:58,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443690556] [2022-03-20 19:26:58,372 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 8 times [2022-03-20 19:26:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963557791] [2022-03-20 19:26:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:58,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:58,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628479998] [2022-03-20 19:26:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:58,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:58,381 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:26:58,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 19:26:58,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:58,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:58,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 19:26:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:58,858 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:00,142 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:00,148 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:00,826 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-20 19:27:01,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-03-20 19:27:03,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963557791] [2022-03-20 19:27:03,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628479998] [2022-03-20 19:27:03,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628479998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:03,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:03,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-03-20 19:27:03,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443690556] [2022-03-20 19:27:03,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443690556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:03,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:03,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:27:03,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969170049] [2022-03-20 19:27:03,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:03,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:27:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:27:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:27:03,507 INFO L87 Difference]: Start difference. First operand 520 states and 754 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-20 19:27:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:05,833 INFO L93 Difference]: Finished difference Result 606 states and 880 transitions. [2022-03-20 19:27:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:27:05,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 91 [2022-03-20 19:27:05,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:05,836 INFO L225 Difference]: With dead ends: 606 [2022-03-20 19:27:05,836 INFO L226 Difference]: Without dead ends: 604 [2022-03-20 19:27:05,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:27:05,837 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 74 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:05,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 418 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 503 Invalid, 0 Unknown, 229 Unchecked, 1.1s Time] [2022-03-20 19:27:05,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-20 19:27:05,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2022-03-20 19:27:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 328 states have (on average 1.2347560975609757) internal successors, (405), 329 states have internal predecessors, (405), 233 states have call successors, (233), 34 states have call predecessors, (233), 33 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-03-20 19:27:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 869 transitions. [2022-03-20 19:27:05,945 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 869 transitions. Word has length 91 [2022-03-20 19:27:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:05,945 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 869 transitions. [2022-03-20 19:27:05,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-03-20 19:27:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 869 transitions. [2022-03-20 19:27:05,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 19:27:05,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:05,948 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-03-20 19:27:05,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-20 19:27:06,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:06,155 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 5 times [2022-03-20 19:27:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:06,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173329409] [2022-03-20 19:27:06,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 6 times [2022-03-20 19:27:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:06,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004821395] [2022-03-20 19:27:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:06,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:06,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207108772] [2022-03-20 19:27:06,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:27:06,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:06,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:06,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:06,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 19:27:06,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:27:06,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 19:27:06,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 19:27:06,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:06,928 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:07,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004821395] [2022-03-20 19:27:07,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:07,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207108772] [2022-03-20 19:27:07,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207108772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:27:07,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:27:07,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 19:27:07,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:07,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173329409] [2022-03-20 19:27:07,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173329409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:07,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:07,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:27:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111308167] [2022-03-20 19:27:07,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:07,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:27:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:27:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:27:07,100 INFO L87 Difference]: Start difference. First operand 595 states and 869 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:27:07,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:07,550 INFO L93 Difference]: Finished difference Result 686 states and 997 transitions. [2022-03-20 19:27:07,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:27:07,551 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2022-03-20 19:27:07,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:07,553 INFO L225 Difference]: With dead ends: 686 [2022-03-20 19:27:07,553 INFO L226 Difference]: Without dead ends: 683 [2022-03-20 19:27:07,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:27:07,554 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:07,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 274 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:27:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-20 19:27:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 675. [2022-03-20 19:27:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 372 states have (on average 1.2338709677419355) internal successors, (459), 374 states have internal predecessors, (459), 264 states have call successors, (264), 39 states have call predecessors, (264), 38 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-03-20 19:27:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 985 transitions. [2022-03-20 19:27:07,675 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 985 transitions. Word has length 97 [2022-03-20 19:27:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:07,675 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 985 transitions. [2022-03-20 19:27:07,675 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:27:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 985 transitions. [2022-03-20 19:27:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 19:27:07,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:07,676 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:07,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:07,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:07,899 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 9 times [2022-03-20 19:27:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790091086] [2022-03-20 19:27:07,900 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 10 times [2022-03-20 19:27:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280277728] [2022-03-20 19:27:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:07,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:07,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:07,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268559372] [2022-03-20 19:27:07,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:27:07,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:07,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:07,908 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:07,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 19:27:07,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:27:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:07,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 19:27:07,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-20 19:27:09,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-20 19:27:11,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280277728] [2022-03-20 19:27:11,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:11,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268559372] [2022-03-20 19:27:11,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268559372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:11,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:11,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 33 [2022-03-20 19:27:11,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:11,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790091086] [2022-03-20 19:27:11,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790091086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:11,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:11,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:27:11,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67666288] [2022-03-20 19:27:11,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:11,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:27:11,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:27:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:27:11,159 INFO L87 Difference]: Start difference. First operand 675 states and 985 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 19:27:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:12,438 INFO L93 Difference]: Finished difference Result 767 states and 1110 transitions. [2022-03-20 19:27:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:27:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2022-03-20 19:27:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:12,441 INFO L225 Difference]: With dead ends: 767 [2022-03-20 19:27:12,441 INFO L226 Difference]: Without dead ends: 765 [2022-03-20 19:27:12,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:27:12,443 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 97 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:12,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 694 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:27:12,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-03-20 19:27:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2022-03-20 19:27:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 412 states have (on average 1.233009708737864) internal successors, (508), 414 states have internal predecessors, (508), 292 states have call successors, (292), 43 states have call predecessors, (292), 42 states have return successors, (290), 289 states have call predecessors, (290), 290 states have call successors, (290) [2022-03-20 19:27:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1090 transitions. [2022-03-20 19:27:12,613 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1090 transitions. Word has length 96 [2022-03-20 19:27:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:12,615 INFO L478 AbstractCegarLoop]: Abstraction has 747 states and 1090 transitions. [2022-03-20 19:27:12,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-20 19:27:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1090 transitions. [2022-03-20 19:27:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 19:27:12,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:12,616 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:12,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:12,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 19:27:12,832 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 7 times [2022-03-20 19:27:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775677292] [2022-03-20 19:27:12,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 8 times [2022-03-20 19:27:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089752125] [2022-03-20 19:27:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:12,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:12,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112941501] [2022-03-20 19:27:12,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:27:12,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:12,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:12,841 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:12,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 19:27:12,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:27:12,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 19:27:12,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:13,736 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 19:27:13,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:15,538 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:18,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:18,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089752125] [2022-03-20 19:27:18,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112941501] [2022-03-20 19:27:18,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112941501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:27:18,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:27:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-20 19:27:18,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:18,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775677292] [2022-03-20 19:27:18,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775677292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:18,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:18,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:27:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721405084] [2022-03-20 19:27:18,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:18,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:27:18,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:18,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:27:18,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:27:18,596 INFO L87 Difference]: Start difference. First operand 747 states and 1090 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 19:27:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:20,592 INFO L93 Difference]: Finished difference Result 831 states and 1208 transitions. [2022-03-20 19:27:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:27:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-03-20 19:27:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:20,597 INFO L225 Difference]: With dead ends: 831 [2022-03-20 19:27:20,597 INFO L226 Difference]: Without dead ends: 828 [2022-03-20 19:27:20,598 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 19:27:20,598 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:20,598 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 575 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:27:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-20 19:27:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 819. [2022-03-20 19:27:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 452 states have (on average 1.2323008849557522) internal successors, (557), 454 states have internal predecessors, (557), 320 states have call successors, (320), 47 states have call predecessors, (320), 46 states have return successors, (318), 317 states have call predecessors, (318), 318 states have call successors, (318) [2022-03-20 19:27:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1195 transitions. [2022-03-20 19:27:20,768 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1195 transitions. Word has length 100 [2022-03-20 19:27:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:20,769 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1195 transitions. [2022-03-20 19:27:20,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-20 19:27:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1195 transitions. [2022-03-20 19:27:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 19:27:20,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:20,770 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:20,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:21,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 19:27:21,002 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 9 times [2022-03-20 19:27:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474327601] [2022-03-20 19:27:21,003 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:21,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 10 times [2022-03-20 19:27:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:21,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23340751] [2022-03-20 19:27:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:21,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:21,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530355741] [2022-03-20 19:27:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:27:21,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:21,012 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:21,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 19:27:21,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:27:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 19:27:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 19:27:22,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-03-20 19:27:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23340751] [2022-03-20 19:27:28,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530355741] [2022-03-20 19:27:28,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530355741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:28,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:28,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-03-20 19:27:28,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:28,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474327601] [2022-03-20 19:27:28,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474327601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:28,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:28,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 19:27:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547419937] [2022-03-20 19:27:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:28,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 19:27:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 19:27:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:27:28,865 INFO L87 Difference]: Start difference. First operand 819 states and 1195 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 19:27:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:32,687 INFO L93 Difference]: Finished difference Result 923 states and 1350 transitions. [2022-03-20 19:27:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:27:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 102 [2022-03-20 19:27:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:32,691 INFO L225 Difference]: With dead ends: 923 [2022-03-20 19:27:32,692 INFO L226 Difference]: Without dead ends: 920 [2022-03-20 19:27:32,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:27:32,696 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:32,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 625 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 19:27:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-20 19:27:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-03-20 19:27:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 495 states have (on average 1.2383838383838384) internal successors, (613), 497 states have internal predecessors, (613), 360 states have call successors, (360), 50 states have call predecessors, (360), 49 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-20 19:27:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1331 transitions. [2022-03-20 19:27:32,898 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1331 transitions. Word has length 102 [2022-03-20 19:27:32,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:32,899 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1331 transitions. [2022-03-20 19:27:32,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-20 19:27:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1331 transitions. [2022-03-20 19:27:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:27:32,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:32,900 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:32,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:33,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:33,118 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:33,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 11 times [2022-03-20 19:27:33,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:33,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1097321708] [2022-03-20 19:27:33,118 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:33,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 12 times [2022-03-20 19:27:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:33,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826805270] [2022-03-20 19:27:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:33,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:33,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:33,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136293229] [2022-03-20 19:27:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:27:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:33,124 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:33,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 19:27:33,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 19:27:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 19:27:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 19:27:34,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-20 19:27:37,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826805270] [2022-03-20 19:27:37,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136293229] [2022-03-20 19:27:37,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136293229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:37,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:37,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-03-20 19:27:37,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1097321708] [2022-03-20 19:27:37,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1097321708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:37,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:37,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:27:37,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985881964] [2022-03-20 19:27:37,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:37,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:27:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:27:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=783, Unknown=1, NotChecked=0, Total=930 [2022-03-20 19:27:37,779 INFO L87 Difference]: Start difference. First operand 905 states and 1331 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 19:27:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:39,099 INFO L93 Difference]: Finished difference Result 990 states and 1451 transitions. [2022-03-20 19:27:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:27:39,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 105 [2022-03-20 19:27:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:39,129 INFO L225 Difference]: With dead ends: 990 [2022-03-20 19:27:39,129 INFO L226 Difference]: Without dead ends: 987 [2022-03-20 19:27:39,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=278, Invalid=1361, Unknown=1, NotChecked=0, Total=1640 [2022-03-20 19:27:39,130 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 76 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:39,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 689 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:27:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-20 19:27:39,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 912. [2022-03-20 19:27:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 501 states have (on average 1.2355289421157685) internal successors, (619), 503 states have internal predecessors, (619), 360 states have call successors, (360), 51 states have call predecessors, (360), 50 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-03-20 19:27:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1337 transitions. [2022-03-20 19:27:39,340 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1337 transitions. Word has length 105 [2022-03-20 19:27:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:39,341 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1337 transitions. [2022-03-20 19:27:39,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 19:27:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1337 transitions. [2022-03-20 19:27:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:27:39,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:39,342 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:39,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:39,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:39,559 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 13 times [2022-03-20 19:27:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:39,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480492673] [2022-03-20 19:27:39,559 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 14 times [2022-03-20 19:27:39,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:39,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323324960] [2022-03-20 19:27:39,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:39,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:39,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:39,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024758082] [2022-03-20 19:27:39,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:27:39,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:39,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:39,573 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:39,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 19:27:39,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:27:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 19:27:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 76 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 19:27:40,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-03-20 19:27:42,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323324960] [2022-03-20 19:27:42,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:42,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024758082] [2022-03-20 19:27:42,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024758082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:42,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:42,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-03-20 19:27:42,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:42,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480492673] [2022-03-20 19:27:42,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480492673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:42,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:42,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 19:27:42,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320116363] [2022-03-20 19:27:42,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:42,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 19:27:42,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 19:27:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:27:42,441 INFO L87 Difference]: Start difference. First operand 912 states and 1337 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 19:27:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:46,087 INFO L93 Difference]: Finished difference Result 1057 states and 1544 transitions. [2022-03-20 19:27:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:27:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 105 [2022-03-20 19:27:46,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:46,105 INFO L225 Difference]: With dead ends: 1057 [2022-03-20 19:27:46,105 INFO L226 Difference]: Without dead ends: 1054 [2022-03-20 19:27:46,105 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 19:27:46,107 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 75 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:46,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 657 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 19:27:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-20 19:27:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 978. [2022-03-20 19:27:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 537 states have (on average 1.23463687150838) internal successors, (663), 539 states have internal predecessors, (663), 384 states have call successors, (384), 57 states have call predecessors, (384), 56 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-20 19:27:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1429 transitions. [2022-03-20 19:27:46,367 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1429 transitions. Word has length 105 [2022-03-20 19:27:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:46,368 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1429 transitions. [2022-03-20 19:27:46,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 19:27:46,369 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1429 transitions. [2022-03-20 19:27:46,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 19:27:46,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:46,370 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 3, 3, 3, 3, 3, 3, 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] [2022-03-20 19:27:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:46,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 19:27:46,587 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 15 times [2022-03-20 19:27:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:46,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963267854] [2022-03-20 19:27:46,588 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 16 times [2022-03-20 19:27:46,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:46,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448139072] [2022-03-20 19:27:46,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:46,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:46,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159248645] [2022-03-20 19:27:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:27:46,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:46,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:46,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:46,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 19:27:46,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:27:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:46,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 19:27:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 94 proven. 89 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-20 19:27:49,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-03-20 19:27:51,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448139072] [2022-03-20 19:27:51,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159248645] [2022-03-20 19:27:51,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159248645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:51,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:51,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-03-20 19:27:51,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963267854] [2022-03-20 19:27:51,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963267854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:51,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:51,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 19:27:51,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328205795] [2022-03-20 19:27:51,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:51,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 19:27:51,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:51,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 19:27:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:27:51,042 INFO L87 Difference]: Start difference. First operand 978 states and 1429 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 19:27:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:53,584 INFO L93 Difference]: Finished difference Result 1079 states and 1562 transitions. [2022-03-20 19:27:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:27:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 110 [2022-03-20 19:27:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:53,613 INFO L225 Difference]: With dead ends: 1079 [2022-03-20 19:27:53,613 INFO L226 Difference]: Without dead ends: 1076 [2022-03-20 19:27:53,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:27:53,614 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:53,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 905 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:27:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-20 19:27:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 930. [2022-03-20 19:27:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 515 states have (on average 1.2271844660194176) internal successors, (632), 517 states have internal predecessors, (632), 356 states have call successors, (356), 59 states have call predecessors, (356), 58 states have return successors, (354), 353 states have call predecessors, (354), 354 states have call successors, (354) [2022-03-20 19:27:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1342 transitions. [2022-03-20 19:27:53,858 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1342 transitions. Word has length 110 [2022-03-20 19:27:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:53,859 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1342 transitions. [2022-03-20 19:27:53,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-20 19:27:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1342 transitions. [2022-03-20 19:27:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 19:27:53,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:53,880 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:53,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:54,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 19:27:54,094 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 1 times [2022-03-20 19:27:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [389965719] [2022-03-20 19:27:54,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 2 times [2022-03-20 19:27:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207760] [2022-03-20 19:27:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:54,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:54,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:54,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526132917] [2022-03-20 19:27:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:27:54,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:54,111 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:54,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 19:27:54,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:27:54,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 19:27:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 71 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 19:27:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-20 19:27:55,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207760] [2022-03-20 19:27:55,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526132917] [2022-03-20 19:27:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526132917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:55,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-20 19:27:55,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [389965719] [2022-03-20 19:27:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [389965719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:55,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:55,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:27:55,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288146714] [2022-03-20 19:27:55,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:55,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:27:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:55,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:27:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:27:55,620 INFO L87 Difference]: Start difference. First operand 930 states and 1342 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:27:56,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:56,449 INFO L93 Difference]: Finished difference Result 1026 states and 1469 transitions. [2022-03-20 19:27:56,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:27:56,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 113 [2022-03-20 19:27:56,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:56,459 INFO L225 Difference]: With dead ends: 1026 [2022-03-20 19:27:56,459 INFO L226 Difference]: Without dead ends: 1024 [2022-03-20 19:27:56,459 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:27:56,460 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 77 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:56,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 556 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:27:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-03-20 19:27:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1010. [2022-03-20 19:27:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 561 states have (on average 1.2245989304812834) internal successors, (687), 563 states have internal predecessors, (687), 384 states have call successors, (384), 65 states have call predecessors, (384), 64 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-03-20 19:27:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1453 transitions. [2022-03-20 19:27:56,768 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1453 transitions. Word has length 113 [2022-03-20 19:27:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:56,768 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1453 transitions. [2022-03-20 19:27:56,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-20 19:27:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1453 transitions. [2022-03-20 19:27:56,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 19:27:56,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:56,797 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:27:56,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 19:27:56,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 19:27:56,998 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 3 times [2022-03-20 19:27:56,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:56,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1805220756] [2022-03-20 19:27:56,998 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:56,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 4 times [2022-03-20 19:27:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333624672] [2022-03-20 19:27:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:56,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:57,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857802322] [2022-03-20 19:27:57,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:27:57,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:57,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:57,007 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:27:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 19:27:57,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:27:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 19:27:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:58,094 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:58,117 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:58,399 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:01,502 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:02,765 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:06,127 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:07,267 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:08,659 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:09,915 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:11,051 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:19,158 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:22,293 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:23,375 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:32,764 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:28:32,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:29:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 90 proven. 129 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 19:29:00,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:29:21,165 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_main_~d~0 c_main_~k~0))) (let ((.cse0 (* c_main_~s~0 .cse2)) (.cse1 (* (- 1) c_main_~q~0 .cse2))) (or (<= (* 2 c_main_~c~0) (+ c_main_~b~0 (* 2 c_main_~v~0))) (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (not (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) c_main_~a~0)) (<= (+ c_main_~b~0 c_main_~v~0) c_main_~c~0) (= (+ (* (+ .cse0 c_main_~s~0 (* (- 1) c_main_~r~0)) c_main_~y~0) (* (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse1)) c_main_~x~0)) (+ c_main_~b~0 (* (- 1) c_main_~c~0) c_main_~v~0)) (not (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) (+ (* (+ (* (- 1) .cse0) c_main_~r~0) c_main_~y~0) (* (+ .cse1 c_main_~p~0) c_main_~x~0))))))) is different from true [2022-03-20 19:29:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 114 proven. 85 refuted. 0 times theorem prover too weak. 212 trivial. 4 not checked. [2022-03-20 19:29:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333624672] [2022-03-20 19:29:45,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:29:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857802322] [2022-03-20 19:29:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857802322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:29:45,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:29:45,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 40 [2022-03-20 19:29:45,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:45,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1805220756] [2022-03-20 19:29:45,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1805220756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:45,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:45,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:29:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488105179] [2022-03-20 19:29:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:45,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:29:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:29:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1210, Unknown=9, NotChecked=74, Total=1560 [2022-03-20 19:29:45,178 INFO L87 Difference]: Start difference. First operand 1010 states and 1453 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 19:29:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:52,734 INFO L93 Difference]: Finished difference Result 1048 states and 1497 transitions. [2022-03-20 19:29:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:29:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 118 [2022-03-20 19:29:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:52,739 INFO L225 Difference]: With dead ends: 1048 [2022-03-20 19:29:52,739 INFO L226 Difference]: Without dead ends: 1046 [2022-03-20 19:29:52,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=341, Invalid=1634, Unknown=9, NotChecked=86, Total=2070 [2022-03-20 19:29:52,740 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 67 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 466 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:52,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 883 Invalid, 1162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 647 Invalid, 0 Unknown, 466 Unchecked, 1.9s Time] [2022-03-20 19:29:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-20 19:29:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1036. [2022-03-20 19:29:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 580 states have (on average 1.2189655172413794) internal successors, (707), 583 states have internal predecessors, (707), 390 states have call successors, (390), 66 states have call predecessors, (390), 65 states have return successors, (388), 386 states have call predecessors, (388), 388 states have call successors, (388) [2022-03-20 19:29:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-03-20 19:29:53,015 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 118 [2022-03-20 19:29:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:53,015 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-03-20 19:29:53,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-20 19:29:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-03-20 19:29:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 19:29:53,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:53,016 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:53,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 19:29:53,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 19:29:53,231 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 17 times [2022-03-20 19:29:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492717676] [2022-03-20 19:29:53,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:29:53,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 18 times [2022-03-20 19:29:53,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837021540] [2022-03-20 19:29:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:53,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:53,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:29:53,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675205909] [2022-03-20 19:29:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:29:53,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:29:53,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:29:53,245 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:29:53,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 19:29:53,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 19:29:53,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:29:53,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 19:29:53,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:29:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-20 19:29:53,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:29:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 19:29:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:29:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837021540] [2022-03-20 19:29:54,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:29:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675205909] [2022-03-20 19:29:54,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675205909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:29:54,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:29:54,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-20 19:29:54,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:29:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492717676] [2022-03-20 19:29:54,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492717676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:29:54,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:29:54,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:29:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288963571] [2022-03-20 19:29:54,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:29:54,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:29:54,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:29:54,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:29:54,137 INFO L87 Difference]: Start difference. First operand 1036 states and 1485 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 19:29:55,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:29:55,086 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-03-20 19:29:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:29:55,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 122 [2022-03-20 19:29:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:29:55,091 INFO L225 Difference]: With dead ends: 1668 [2022-03-20 19:29:55,091 INFO L226 Difference]: Without dead ends: 1176 [2022-03-20 19:29:55,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:29:55,093 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:29:55,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 261 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:29:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-20 19:29:55,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2022-03-20 19:29:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 616 states have (on average 1.2077922077922079) internal successors, (744), 641 states have internal predecessors, (744), 400 states have call successors, (400), 63 states have call predecessors, (400), 62 states have return successors, (398), 374 states have call predecessors, (398), 398 states have call successors, (398) [2022-03-20 19:29:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1542 transitions. [2022-03-20 19:29:55,384 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1542 transitions. Word has length 122 [2022-03-20 19:29:55,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:29:55,384 INFO L478 AbstractCegarLoop]: Abstraction has 1079 states and 1542 transitions. [2022-03-20 19:29:55,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 19:29:55,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1542 transitions. [2022-03-20 19:29:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 19:29:55,385 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:29:55,385 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:29:55,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 19:29:55,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 19:29:55,593 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:29:55,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:29:55,593 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 19 times [2022-03-20 19:29:55,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:29:55,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670960385] [2022-03-20 19:29:55,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:29:55,593 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 20 times [2022-03-20 19:29:55,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:29:55,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857280198] [2022-03-20 19:29:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:29:55,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:29:55,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:29:55,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736348614] [2022-03-20 19:29:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:29:55,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:29:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:29:55,612 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:29:55,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 19:29:55,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:29:55,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:29:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 19:29:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:30:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 19:30:00,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:30:03,788 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:30:03,799 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:30:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 19:30:08,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857280198] [2022-03-20 19:30:08,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:30:08,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736348614] [2022-03-20 19:30:08,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736348614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:30:08,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:30:08,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-03-20 19:30:08,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:08,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670960385] [2022-03-20 19:30:08,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670960385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:08,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:08,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:30:08,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688126266] [2022-03-20 19:30:08,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:08,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:30:08,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:08,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:30:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:30:08,526 INFO L87 Difference]: Start difference. First operand 1079 states and 1542 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:30:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:12,511 INFO L93 Difference]: Finished difference Result 1207 states and 1726 transitions. [2022-03-20 19:30:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:30:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 122 [2022-03-20 19:30:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:12,520 INFO L225 Difference]: With dead ends: 1207 [2022-03-20 19:30:12,520 INFO L226 Difference]: Without dead ends: 1204 [2022-03-20 19:30:12,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:30:12,522 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:12,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 550 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 19:30:12,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-20 19:30:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1118. [2022-03-20 19:30:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 636 states have (on average 1.2091194968553458) internal successors, (769), 661 states have internal predecessors, (769), 416 states have call successors, (416), 66 states have call predecessors, (416), 65 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-20 19:30:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1599 transitions. [2022-03-20 19:30:12,893 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1599 transitions. Word has length 122 [2022-03-20 19:30:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:12,893 INFO L478 AbstractCegarLoop]: Abstraction has 1118 states and 1599 transitions. [2022-03-20 19:30:12,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:30:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1599 transitions. [2022-03-20 19:30:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 19:30:12,894 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:12,894 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2022-03-20 19:30:12,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 19:30:13,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:13,102 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 21 times [2022-03-20 19:30:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759175300] [2022-03-20 19:30:13,103 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 22 times [2022-03-20 19:30:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:13,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391591184] [2022-03-20 19:30:13,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:13,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:13,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:30:13,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68426768] [2022-03-20 19:30:13,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:30:13,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:13,110 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:30:13,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 19:30:13,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:30:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:30:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 19:30:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:30:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 139 proven. 89 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-20 19:30:18,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:30:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 149 proven. 47 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-03-20 19:30:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391591184] [2022-03-20 19:30:32,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:30:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68426768] [2022-03-20 19:30:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68426768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:30:32,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:30:32,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-03-20 19:30:32,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:32,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759175300] [2022-03-20 19:30:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759175300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:32,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:32,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:30:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145694724] [2022-03-20 19:30:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:32,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:30:32,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:30:32,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:30:32,428 INFO L87 Difference]: Start difference. First operand 1118 states and 1599 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:30:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:38,989 INFO L93 Difference]: Finished difference Result 1243 states and 1785 transitions. [2022-03-20 19:30:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 19:30:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 124 [2022-03-20 19:30:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:39,008 INFO L225 Difference]: With dead ends: 1243 [2022-03-20 19:30:39,009 INFO L226 Difference]: Without dead ends: 1240 [2022-03-20 19:30:39,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 19:30:39,010 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:39,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 738 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 19:30:39,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-03-20 19:30:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1128. [2022-03-20 19:30:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 641 states have (on average 1.2090483619344774) internal successors, (775), 666 states have internal predecessors, (775), 420 states have call successors, (420), 67 states have call predecessors, (420), 66 states have return successors, (418), 394 states have call predecessors, (418), 418 states have call successors, (418) [2022-03-20 19:30:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1613 transitions. [2022-03-20 19:30:39,489 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1613 transitions. Word has length 124 [2022-03-20 19:30:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:39,490 INFO L478 AbstractCegarLoop]: Abstraction has 1128 states and 1613 transitions. [2022-03-20 19:30:39,490 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:30:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1613 transitions. [2022-03-20 19:30:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 19:30:39,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:39,491 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:39,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 19:30:39,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-20 19:30:39,708 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 11 times [2022-03-20 19:30:39,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120546687] [2022-03-20 19:30:39,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:39,709 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 12 times [2022-03-20 19:30:39,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:39,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838754336] [2022-03-20 19:30:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:39,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:30:39,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940914740] [2022-03-20 19:30:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:30:39,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:39,720 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:30:39,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 19:30:39,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:30:39,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:30:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 19:30:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:30:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-03-20 19:30:40,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:30:44,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838754336] [2022-03-20 19:30:44,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:30:44,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940914740] [2022-03-20 19:30:44,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940914740] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:30:44,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:30:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 19:30:44,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:44,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120546687] [2022-03-20 19:30:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120546687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:44,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:44,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:30:44,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721591157] [2022-03-20 19:30:44,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:44,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:30:44,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:44,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:30:44,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2022-03-20 19:30:44,934 INFO L87 Difference]: Start difference. First operand 1128 states and 1613 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 19:30:46,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:30:46,662 INFO L93 Difference]: Finished difference Result 1166 states and 1653 transitions. [2022-03-20 19:30:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:30:46,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-03-20 19:30:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:30:46,667 INFO L225 Difference]: With dead ends: 1166 [2022-03-20 19:30:46,667 INFO L226 Difference]: Without dead ends: 1164 [2022-03-20 19:30:46,667 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=105, Invalid=446, Unknown=1, NotChecked=0, Total=552 [2022-03-20 19:30:46,667 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:30:46,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 223 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:30:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-03-20 19:30:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1111. [2022-03-20 19:30:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 628 states have (on average 1.2117834394904459) internal successors, (761), 653 states have internal predecessors, (761), 416 states have call successors, (416), 67 states have call predecessors, (416), 66 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-03-20 19:30:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1591 transitions. [2022-03-20 19:30:46,974 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1591 transitions. Word has length 121 [2022-03-20 19:30:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:30:46,975 INFO L478 AbstractCegarLoop]: Abstraction has 1111 states and 1591 transitions. [2022-03-20 19:30:46,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-20 19:30:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1591 transitions. [2022-03-20 19:30:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:30:46,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:30:46,976 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:30:46,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 19:30:47,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:47,193 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:30:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:30:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 23 times [2022-03-20 19:30:47,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:47,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117419973] [2022-03-20 19:30:47,195 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:30:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 24 times [2022-03-20 19:30:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:30:47,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898271340] [2022-03-20 19:30:47,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:30:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:30:47,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:30:47,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2761488] [2022-03-20 19:30:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:30:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:30:47,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:30:47,203 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:30:47,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 19:30:47,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 19:30:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:30:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 19:30:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:30:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 19:30:51,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:30:54,931 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:30:55,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:30:55,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898271340] [2022-03-20 19:30:55,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:30:55,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2761488] [2022-03-20 19:30:55,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2761488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:30:55,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:30:55,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-03-20 19:30:55,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:30:55,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117419973] [2022-03-20 19:30:55,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117419973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:30:55,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:30:55,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:30:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85455464] [2022-03-20 19:30:55,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:30:55,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:30:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:30:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:30:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:30:55,615 INFO L87 Difference]: Start difference. First operand 1111 states and 1591 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 19:31:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:31:02,118 INFO L93 Difference]: Finished difference Result 1237 states and 1772 transitions. [2022-03-20 19:31:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:31:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 127 [2022-03-20 19:31:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:31:02,123 INFO L225 Difference]: With dead ends: 1237 [2022-03-20 19:31:02,123 INFO L226 Difference]: Without dead ends: 1234 [2022-03-20 19:31:02,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:31:02,124 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 72 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:31:02,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 859 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 19:31:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-20 19:31:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1140. [2022-03-20 19:31:02,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 643 states have (on average 1.213063763608087) internal successors, (780), 668 states have internal predecessors, (780), 428 states have call successors, (428), 69 states have call predecessors, (428), 68 states have return successors, (426), 402 states have call predecessors, (426), 426 states have call successors, (426) [2022-03-20 19:31:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1634 transitions. [2022-03-20 19:31:02,444 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1634 transitions. Word has length 127 [2022-03-20 19:31:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:31:02,444 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1634 transitions. [2022-03-20 19:31:02,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-20 19:31:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1634 transitions. [2022-03-20 19:31:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:31:02,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:31:02,446 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:31:02,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 19:31:02,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:31:02,662 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:31:02,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:31:02,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 25 times [2022-03-20 19:31:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:31:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361565601] [2022-03-20 19:31:02,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:31:02,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 26 times [2022-03-20 19:31:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:31:02,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463343439] [2022-03-20 19:31:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:31:02,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:31:02,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:31:02,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798729500] [2022-03-20 19:31:02,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:31:02,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:31:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:31:02,671 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:31:02,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 19:31:02,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:31:02,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:31:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 19:31:02,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:31:03,611 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:31:03,612 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:31:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 19:31:08,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:31:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-03-20 19:31:16,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:31:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463343439] [2022-03-20 19:31:16,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:31:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798729500] [2022-03-20 19:31:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798729500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:31:16,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:31:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-20 19:31:16,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:31:16,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361565601] [2022-03-20 19:31:16,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361565601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:31:16,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:31:16,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 19:31:16,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847790856] [2022-03-20 19:31:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:31:16,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 19:31:16,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:31:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 19:31:16,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:31:16,221 INFO L87 Difference]: Start difference. First operand 1140 states and 1634 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:31:20,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:31:22,407 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 [] [2022-03-20 19:31:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:31:27,228 INFO L93 Difference]: Finished difference Result 1268 states and 1824 transitions. [2022-03-20 19:31:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:31:27,229 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-20 19:31:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:31:27,234 INFO L225 Difference]: With dead ends: 1268 [2022-03-20 19:31:27,234 INFO L226 Difference]: Without dead ends: 1265 [2022-03-20 19:31:27,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:31:27,235 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:31:27,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 846 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1335 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-03-20 19:31:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-03-20 19:31:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-03-20 19:31:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 694 states have (on average 1.217579250720461) internal successors, (845), 721 states have internal predecessors, (845), 472 states have call successors, (472), 73 states have call predecessors, (472), 72 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-20 19:31:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1787 transitions. [2022-03-20 19:31:27,587 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1787 transitions. Word has length 127 [2022-03-20 19:31:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:31:27,587 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1787 transitions. [2022-03-20 19:31:27,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:31:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1787 transitions. [2022-03-20 19:31:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:31:27,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:31:27,589 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:31:27,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 19:31:27,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-20 19:31:27,826 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:31:27,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:31:27,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 27 times [2022-03-20 19:31:27,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:31:27,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616157248] [2022-03-20 19:31:27,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:31:27,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 28 times [2022-03-20 19:31:27,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:31:27,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754763015] [2022-03-20 19:31:27,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:31:27,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:31:27,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:31:27,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452261112] [2022-03-20 19:31:27,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:31:27,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:31:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:31:27,833 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:31:27,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 19:31:27,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:31:27,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:31:27,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-20 19:31:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:31:30,083 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:31:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 137 proven. 134 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-20 19:31:34,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:31:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 178 proven. 17 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-03-20 19:31:45,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:31:45,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754763015] [2022-03-20 19:31:45,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:31:45,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452261112] [2022-03-20 19:31:45,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452261112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:31:45,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:31:45,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2022-03-20 19:31:45,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:31:45,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616157248] [2022-03-20 19:31:45,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616157248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:31:45,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:31:45,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 19:31:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968385278] [2022-03-20 19:31:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:31:45,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 19:31:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:31:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 19:31:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:31:45,330 INFO L87 Difference]: Start difference. First operand 1239 states and 1787 transitions. Second operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:31:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:31:53,705 INFO L93 Difference]: Finished difference Result 1339 states and 1928 transitions. [2022-03-20 19:31:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 19:31:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-03-20 19:31:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:31:53,733 INFO L225 Difference]: With dead ends: 1339 [2022-03-20 19:31:53,733 INFO L226 Difference]: Without dead ends: 1336 [2022-03-20 19:31:53,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:31:53,734 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 103 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:31:53,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 635 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 19:31:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-20 19:31:54,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1243. [2022-03-20 19:31:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 697 states have (on average 1.2166427546628407) internal successors, (848), 724 states have internal predecessors, (848), 472 states have call successors, (472), 74 states have call predecessors, (472), 73 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-03-20 19:31:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1790 transitions. [2022-03-20 19:31:54,247 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1790 transitions. Word has length 127 [2022-03-20 19:31:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:31:54,247 INFO L478 AbstractCegarLoop]: Abstraction has 1243 states and 1790 transitions. [2022-03-20 19:31:54,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:31:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1790 transitions. [2022-03-20 19:31:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 19:31:54,249 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:31:54,249 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-20 19:31:54,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 19:31:54,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 19:31:54,463 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:31:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:31:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 29 times [2022-03-20 19:31:54,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:31:54,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098974681] [2022-03-20 19:31:54,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:31:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 30 times [2022-03-20 19:31:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:31:54,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864324395] [2022-03-20 19:31:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:31:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:31:54,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:31:54,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62336234] [2022-03-20 19:31:54,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:31:54,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:31:54,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:31:54,476 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:31:54,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 19:31:54,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 19:31:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:31:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 19:31:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:31:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 19:31:59,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:32:08,424 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:32:36,994 WARN L232 SmtUtils]: Spent 7.71s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 19:32:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 156 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 19:32:42,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:32:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864324395] [2022-03-20 19:32:42,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:32:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62336234] [2022-03-20 19:32:42,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62336234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:32:42,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:32:42,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2022-03-20 19:32:42,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:32:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098974681] [2022-03-20 19:32:42,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098974681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:32:42,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:32:42,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:32:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206063460] [2022-03-20 19:32:42,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:32:42,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:32:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:32:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:32:42,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1249, Unknown=1, NotChecked=0, Total=1560 [2022-03-20 19:32:42,143 INFO L87 Difference]: Start difference. First operand 1243 states and 1790 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:32:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:32:48,472 INFO L93 Difference]: Finished difference Result 1350 states and 1938 transitions. [2022-03-20 19:32:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:32:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 130 [2022-03-20 19:32:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:32:48,484 INFO L225 Difference]: With dead ends: 1350 [2022-03-20 19:32:48,484 INFO L226 Difference]: Without dead ends: 1347 [2022-03-20 19:32:48,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=457, Invalid=1894, Unknown=1, NotChecked=0, Total=2352 [2022-03-20 19:32:48,485 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 77 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:32:48,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 871 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 19:32:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-03-20 19:32:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1248. [2022-03-20 19:32:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 700 states have (on average 1.2157142857142857) internal successors, (851), 727 states have internal predecessors, (851), 473 states have call successors, (473), 75 states have call predecessors, (473), 74 states have return successors, (471), 445 states have call predecessors, (471), 471 states have call successors, (471) [2022-03-20 19:32:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1795 transitions. [2022-03-20 19:32:48,888 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1795 transitions. Word has length 130 [2022-03-20 19:32:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:32:48,888 INFO L478 AbstractCegarLoop]: Abstraction has 1248 states and 1795 transitions. [2022-03-20 19:32:48,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:32:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1795 transitions. [2022-03-20 19:32:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 19:32:48,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:32:48,890 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:32:48,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 19:32:49,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 19:32:49,103 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:32:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:32:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 31 times [2022-03-20 19:32:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:32:49,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176546390] [2022-03-20 19:32:49,104 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:32:49,104 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 32 times [2022-03-20 19:32:49,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:32:49,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634301816] [2022-03-20 19:32:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:32:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:32:49,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:32:49,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141269446] [2022-03-20 19:32:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:32:49,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:32:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:32:49,111 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:32:49,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 19:32:49,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:32:49,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:32:49,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 19:32:49,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:32:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 107 proven. 114 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-20 19:32:54,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:32:56,983 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:32:58,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:32:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634301816] [2022-03-20 19:32:58,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:32:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141269446] [2022-03-20 19:32:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141269446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:32:58,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:32:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 19:32:58,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:32:58,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176546390] [2022-03-20 19:32:58,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176546390] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:32:58,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:32:58,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:32:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699365327] [2022-03-20 19:32:58,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:32:58,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:32:58,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:32:58,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:32:58,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:32:58,993 INFO L87 Difference]: Start difference. First operand 1248 states and 1795 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:33:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:33:09,562 INFO L93 Difference]: Finished difference Result 1389 states and 2002 transitions. [2022-03-20 19:33:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 19:33:09,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 132 [2022-03-20 19:33:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:33:09,568 INFO L225 Difference]: With dead ends: 1389 [2022-03-20 19:33:09,568 INFO L226 Difference]: Without dead ends: 1386 [2022-03-20 19:33:09,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:33:09,569 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 91 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:33:09,569 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1115 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 19:33:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-03-20 19:33:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1343. [2022-03-20 19:33:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 748 states have (on average 1.2205882352941178) internal successors, (913), 777 states have internal predecessors, (913), 517 states have call successors, (517), 78 states have call predecessors, (517), 77 states have return successors, (515), 487 states have call predecessors, (515), 515 states have call successors, (515) [2022-03-20 19:33:10,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1945 transitions. [2022-03-20 19:33:10,012 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1945 transitions. Word has length 132 [2022-03-20 19:33:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:33:10,013 INFO L478 AbstractCegarLoop]: Abstraction has 1343 states and 1945 transitions. [2022-03-20 19:33:10,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:33:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1945 transitions. [2022-03-20 19:33:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 19:33:10,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:33:10,014 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:33:10,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 19:33:10,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:33:10,231 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:33:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:33:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 33 times [2022-03-20 19:33:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:33:10,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1826377551] [2022-03-20 19:33:10,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:33:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 34 times [2022-03-20 19:33:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:33:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940265860] [2022-03-20 19:33:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:33:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:33:10,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:33:10,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065763899] [2022-03-20 19:33:10,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:33:10,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:33:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:33:10,240 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:33:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 19:33:10,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:33:10,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:33:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-20 19:33:10,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:33:12,767 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:33:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 162 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 19:33:35,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:33:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-03-20 19:33:49,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:33:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940265860] [2022-03-20 19:33:49,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:33:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065763899] [2022-03-20 19:33:49,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065763899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:33:49,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:33:49,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-03-20 19:33:49,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:33:49,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1826377551] [2022-03-20 19:33:49,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1826377551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:33:49,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:33:49,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:33:49,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746681006] [2022-03-20 19:33:49,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:33:49,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:33:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:33:49,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:33:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:33:49,062 INFO L87 Difference]: Start difference. First operand 1343 states and 1945 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:33:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:33:57,176 INFO L93 Difference]: Finished difference Result 1389 states and 2006 transitions. [2022-03-20 19:33:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 19:33:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 132 [2022-03-20 19:33:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:33:57,180 INFO L225 Difference]: With dead ends: 1389 [2022-03-20 19:33:57,180 INFO L226 Difference]: Without dead ends: 1382 [2022-03-20 19:33:57,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:33:57,181 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 65 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:33:57,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 969 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 668 Invalid, 0 Unknown, 379 Unchecked, 1.8s Time] [2022-03-20 19:33:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-20 19:33:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1366. [2022-03-20 19:33:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 763 states have (on average 1.2201834862385321) internal successors, (931), 792 states have internal predecessors, (931), 525 states have call successors, (525), 78 states have call predecessors, (525), 77 states have return successors, (523), 495 states have call predecessors, (523), 523 states have call successors, (523) [2022-03-20 19:33:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1979 transitions. [2022-03-20 19:33:57,692 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1979 transitions. Word has length 132 [2022-03-20 19:33:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:33:57,692 INFO L478 AbstractCegarLoop]: Abstraction has 1366 states and 1979 transitions. [2022-03-20 19:33:57,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:33:57,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1979 transitions. [2022-03-20 19:33:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 19:33:57,694 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:33:57,695 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:33:57,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 19:33:57,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 19:33:57,895 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:33:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:33:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 35 times [2022-03-20 19:33:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:33:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200105151] [2022-03-20 19:33:57,896 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:33:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 36 times [2022-03-20 19:33:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:33:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077181544] [2022-03-20 19:33:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:33:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:33:57,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:33:57,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037262919] [2022-03-20 19:33:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:33:57,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:33:57,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:33:57,903 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:33:57,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 19:33:58,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 19:33:58,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:33:58,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 19:33:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:34:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-20 19:34:05,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:34:12,220 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:34:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:34:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077181544] [2022-03-20 19:34:15,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:34:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037262919] [2022-03-20 19:34:15,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037262919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:34:15,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:34:15,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-20 19:34:15,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:34:15,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200105151] [2022-03-20 19:34:15,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200105151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:34:15,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:34:15,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 19:34:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828430625] [2022-03-20 19:34:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:34:15,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 19:34:15,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:34:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 19:34:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:34:15,958 INFO L87 Difference]: Start difference. First operand 1366 states and 1979 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:34:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:34:25,851 INFO L93 Difference]: Finished difference Result 1491 states and 2148 transitions. [2022-03-20 19:34:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 19:34:25,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 135 [2022-03-20 19:34:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:34:25,855 INFO L225 Difference]: With dead ends: 1491 [2022-03-20 19:34:25,855 INFO L226 Difference]: Without dead ends: 1488 [2022-03-20 19:34:25,856 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=396, Invalid=2910, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 19:34:25,857 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 124 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:34:25,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 813 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-20 19:34:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-03-20 19:34:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1448. [2022-03-20 19:34:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 810 states have (on average 1.2185185185185186) internal successors, (987), 840 states have internal predecessors, (987), 555 states have call successors, (555), 83 states have call predecessors, (555), 82 states have return successors, (553), 524 states have call predecessors, (553), 553 states have call successors, (553) [2022-03-20 19:34:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 2095 transitions. [2022-03-20 19:34:26,368 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 2095 transitions. Word has length 135 [2022-03-20 19:34:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:34:26,369 INFO L478 AbstractCegarLoop]: Abstraction has 1448 states and 2095 transitions. [2022-03-20 19:34:26,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:34:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 2095 transitions. [2022-03-20 19:34:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 19:34:26,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:34:26,371 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:34:26,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 19:34:26,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 19:34:26,591 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:34:26,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:34:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 37 times [2022-03-20 19:34:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:34:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792050500] [2022-03-20 19:34:26,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:34:26,592 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 38 times [2022-03-20 19:34:26,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:34:26,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123014415] [2022-03-20 19:34:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:34:26,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:34:26,598 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:34:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195791275] [2022-03-20 19:34:26,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:34:26,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:34:26,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:34:26,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:34:26,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 19:34:26,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:34:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:34:26,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 128 conjunts are in the unsatisfiable core [2022-03-20 19:34:26,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:34:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 99 proven. 182 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-03-20 19:34:31,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:34:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 170 proven. 52 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 19:34:39,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:34:39,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123014415] [2022-03-20 19:34:39,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:34:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195791275] [2022-03-20 19:34:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195791275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:34:39,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:34:39,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-20 19:34:39,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:34:39,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792050500] [2022-03-20 19:34:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792050500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:34:39,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:34:39,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:34:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741695632] [2022-03-20 19:34:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:34:39,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:34:39,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:34:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:34:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=935, Unknown=2, NotChecked=0, Total=1122 [2022-03-20 19:34:39,718 INFO L87 Difference]: Start difference. First operand 1448 states and 2095 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:34:47,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:34:47,260 INFO L93 Difference]: Finished difference Result 1574 states and 2264 transitions. [2022-03-20 19:34:47,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 19:34:47,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 135 [2022-03-20 19:34:47,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:34:47,265 INFO L225 Difference]: With dead ends: 1574 [2022-03-20 19:34:47,265 INFO L226 Difference]: Without dead ends: 1571 [2022-03-20 19:34:47,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=320, Invalid=1658, Unknown=2, NotChecked=0, Total=1980 [2022-03-20 19:34:47,266 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:34:47,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 955 Invalid, 1749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 19:34:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-03-20 19:34:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1524. [2022-03-20 19:34:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 853 states have (on average 1.2180539273153577) internal successors, (1039), 885 states have internal predecessors, (1039), 583 states have call successors, (583), 88 states have call predecessors, (583), 87 states have return successors, (581), 550 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-20 19:34:47,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2203 transitions. [2022-03-20 19:34:47,795 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2203 transitions. Word has length 135 [2022-03-20 19:34:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:34:47,795 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 2203 transitions. [2022-03-20 19:34:47,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 19:34:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2203 transitions. [2022-03-20 19:34:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 19:34:47,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:34:47,797 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:34:47,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-20 19:34:48,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 19:34:48,011 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:34:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:34:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 5 times [2022-03-20 19:34:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:34:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754605918] [2022-03-20 19:34:48,012 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:34:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1280763070, now seen corresponding path program 6 times [2022-03-20 19:34:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:34:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921011920] [2022-03-20 19:34:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:34:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:34:48,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:34:48,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881896266] [2022-03-20 19:34:48,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:34:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:34:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:34:48,018 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:34:48,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 19:34:48,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 19:34:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:34:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 19:34:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:34:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 119 proven. 92 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-03-20 19:34:50,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:34:52,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:34:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921011920] [2022-03-20 19:34:52,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:34:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881896266] [2022-03-20 19:34:52,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881896266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:34:52,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:34:52,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 19:34:52,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:34:52,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754605918] [2022-03-20 19:34:52,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754605918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:34:52,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:34:52,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:34:52,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232571961] [2022-03-20 19:34:52,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:34:52,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:34:52,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:34:52,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:34:52,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:34:52,290 INFO L87 Difference]: Start difference. First operand 1524 states and 2203 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 19:35:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:35:12,279 INFO L93 Difference]: Finished difference Result 1693 states and 2444 transitions. [2022-03-20 19:35:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:35:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 140 [2022-03-20 19:35:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:35:12,290 INFO L225 Difference]: With dead ends: 1693 [2022-03-20 19:35:12,290 INFO L226 Difference]: Without dead ends: 1691 [2022-03-20 19:35:12,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=259, Invalid=1142, Unknown=5, NotChecked=0, Total=1406 [2022-03-20 19:35:12,292 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 69 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:35:12,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 455 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 522 Invalid, 0 Unknown, 57 Unchecked, 1.9s Time] [2022-03-20 19:35:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-03-20 19:35:12,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1652. [2022-03-20 19:35:12,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 922 states have (on average 1.2201735357917571) internal successors, (1125), 959 states have internal predecessors, (1125), 636 states have call successors, (636), 94 states have call predecessors, (636), 93 states have return successors, (634), 598 states have call predecessors, (634), 634 states have call successors, (634) [2022-03-20 19:35:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 2395 transitions. [2022-03-20 19:35:12,954 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 2395 transitions. Word has length 140 [2022-03-20 19:35:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:35:12,954 INFO L478 AbstractCegarLoop]: Abstraction has 1652 states and 2395 transitions. [2022-03-20 19:35:12,954 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 19:35:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 2395 transitions. [2022-03-20 19:35:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 19:35:12,956 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:35:12,956 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:35:12,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 19:35:13,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 19:35:13,172 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:35:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:35:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 39 times [2022-03-20 19:35:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:35:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [814123801] [2022-03-20 19:35:13,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:35:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 40 times [2022-03-20 19:35:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:35:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22828897] [2022-03-20 19:35:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:35:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:35:13,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:35:13,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254869138] [2022-03-20 19:35:13,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:35:13,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:35:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:35:13,178 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:35:13,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 19:35:13,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:35:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:35:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 19:35:13,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:35:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 19:35:17,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:35:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-03-20 19:35:23,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:35:23,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22828897] [2022-03-20 19:35:23,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:35:23,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254869138] [2022-03-20 19:35:23,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254869138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:35:23,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:35:23,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 34 [2022-03-20 19:35:23,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:35:23,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [814123801] [2022-03-20 19:35:23,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [814123801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:35:23,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:35:23,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:35:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92114502] [2022-03-20 19:35:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:35:23,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:35:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:35:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:35:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:35:23,383 INFO L87 Difference]: Start difference. First operand 1652 states and 2395 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:35:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:35:36,562 INFO L93 Difference]: Finished difference Result 1861 states and 2684 transitions. [2022-03-20 19:35:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:35:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 140 [2022-03-20 19:35:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:35:36,567 INFO L225 Difference]: With dead ends: 1861 [2022-03-20 19:35:36,568 INFO L226 Difference]: Without dead ends: 1854 [2022-03-20 19:35:36,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:35:36,569 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 114 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:35:36,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1233 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-03-20 19:35:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2022-03-20 19:35:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1770. [2022-03-20 19:35:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 990 states have (on average 1.2181818181818183) internal successors, (1206), 1031 states have internal predecessors, (1206), 679 states have call successors, (679), 101 states have call predecessors, (679), 100 states have return successors, (677), 637 states have call predecessors, (677), 677 states have call successors, (677) [2022-03-20 19:35:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2562 transitions. [2022-03-20 19:35:37,271 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2562 transitions. Word has length 140 [2022-03-20 19:35:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:35:37,271 INFO L478 AbstractCegarLoop]: Abstraction has 1770 states and 2562 transitions. [2022-03-20 19:35:37,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 19:35:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2562 transitions. [2022-03-20 19:35:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 19:35:37,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:35:37,274 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:35:37,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 19:35:37,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:35:37,491 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:35:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:35:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 41 times [2022-03-20 19:35:37,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:35:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965456906] [2022-03-20 19:35:37,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:35:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 42 times [2022-03-20 19:35:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:35:37,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266910233] [2022-03-20 19:35:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:35:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:35:37,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:35:37,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564301627] [2022-03-20 19:35:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:35:37,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:35:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:35:37,498 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:35:37,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 19:35:37,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 19:35:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:35:37,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 19:35:37,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:35:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-20 19:35:41,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:35:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-03-20 19:35:49,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:35:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266910233] [2022-03-20 19:35:49,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:35:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564301627] [2022-03-20 19:35:49,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564301627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:35:49,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:35:49,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-03-20 19:35:49,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:35:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965456906] [2022-03-20 19:35:49,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965456906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:35:49,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:35:49,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:35:49,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231980461] [2022-03-20 19:35:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:35:49,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:35:49,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:35:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:35:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:35:49,643 INFO L87 Difference]: Start difference. First operand 1770 states and 2562 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-20 19:35:55,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:35:55,199 INFO L93 Difference]: Finished difference Result 2151 states and 3104 transitions. [2022-03-20 19:35:55,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:35:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 144 [2022-03-20 19:35:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:35:55,205 INFO L225 Difference]: With dead ends: 2151 [2022-03-20 19:35:55,205 INFO L226 Difference]: Without dead ends: 1861 [2022-03-20 19:35:55,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:35:55,206 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 61 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:35:55,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 704 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 19:35:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-03-20 19:35:55,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1843. [2022-03-20 19:35:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1032 states have (on average 1.2170542635658914) internal successors, (1256), 1076 states have internal predecessors, (1256), 706 states have call successors, (706), 105 states have call predecessors, (706), 104 states have return successors, (704), 661 states have call predecessors, (704), 704 states have call successors, (704) [2022-03-20 19:35:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2666 transitions. [2022-03-20 19:35:55,995 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2666 transitions. Word has length 144 [2022-03-20 19:35:55,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:35:55,995 INFO L478 AbstractCegarLoop]: Abstraction has 1843 states and 2666 transitions. [2022-03-20 19:35:55,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-03-20 19:35:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2666 transitions. [2022-03-20 19:35:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 19:35:55,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:35:55,998 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:35:56,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 19:35:56,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:35:56,215 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:35:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:35:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 43 times [2022-03-20 19:35:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:35:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075338726] [2022-03-20 19:35:56,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:35:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 44 times [2022-03-20 19:35:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:35:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412038536] [2022-03-20 19:35:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:35:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:35:56,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:35:56,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191545708] [2022-03-20 19:35:56,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:35:56,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:35:56,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:35:56,235 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 19:35:56,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 19:35:56,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:35:56,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:35:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 19:35:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates...