/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:24:04,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:24:04,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:24:04,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:24:04,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:24:04,728 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:24:04,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:24:04,732 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 19:24:04,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:24:04,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:24:04,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:24:04,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:24:04,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:24:04,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:24:04,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:24:04,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:24:04,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:24:04,740 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:24:04,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:24:04,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:24:04,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:24:04,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:24:04,924 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:24:04,927 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:24:04,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 19:24:04,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dfea28/54c5f6b733e949c89ea808ab26fb436c/FLAGfe335c861 [2022-03-20 19:24:05,294 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:24:05,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-03-20 19:24:05,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dfea28/54c5f6b733e949c89ea808ab26fb436c/FLAGfe335c861 [2022-03-20 19:24:05,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f8dfea28/54c5f6b733e949c89ea808ab26fb436c [2022-03-20 19:24:05,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:24:05,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:24:05,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:24:05,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:24:05,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:24:05,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af06b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05, skipping insertion in model container [2022-03-20 19:24:05,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:24:05,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:24:05,919 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/egcd2-ll.c[490,503] [2022-03-20 19:24:05,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:24:05,956 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:24:05,965 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/egcd2-ll.c[490,503] [2022-03-20 19:24:05,970 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:24:05,977 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:24:05,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05 WrapperNode [2022-03-20 19:24:05,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:24:05,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:24:05,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:24:05,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:24:05,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:05,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:06,000 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:06,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:06,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:24:06,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:24:06,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:24:06,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:24:06,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (1/1) ... [2022-03-20 19:24:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:24:06,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:06,025 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 19:24:06,030 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 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:24:06,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:24:06,047 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:24:06,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:24:06,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:24:06,097 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:24:06,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:24:06,208 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:24:06,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:24:06,212 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 19:24:06,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:24:06 BoogieIcfgContainer [2022-03-20 19:24:06,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:24:06,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:24:06,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:24:06,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:24:06,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:24:05" (1/3) ... [2022-03-20 19:24:06,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efa83ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:24:06, skipping insertion in model container [2022-03-20 19:24:06,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:24:05" (2/3) ... [2022-03-20 19:24:06,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efa83ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:24:06, skipping insertion in model container [2022-03-20 19:24:06,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:24:06" (3/3) ... [2022-03-20 19:24:06,231 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-03-20 19:24:06,234 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:24:06,234 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:24:06,260 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:24:06,264 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 19:24:06,264 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:24:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 19:24:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:24:06,281 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:06,281 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:06,281 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:06,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2022-03-20 19:24:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:06,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067537242] [2022-03-20 19:24:06,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:06,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 2 times [2022-03-20 19:24:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:06,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689948579] [2022-03-20 19:24:06,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:06,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:24:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 19:24:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 19:24:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 19:24:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 19:24:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:24:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 19:24:06,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:06,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689948579] [2022-03-20 19:24:06,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689948579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:06,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:06,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:24:06,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:06,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067537242] [2022-03-20 19:24:06,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067537242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:06,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:06,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:24:06,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528284700] [2022-03-20 19:24:06,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:06,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:24:06,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:24:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:24:06,470 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:24:06,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:06,556 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-03-20 19:24:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:24:06,558 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 19:24:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:06,562 INFO L225 Difference]: With dead ends: 67 [2022-03-20 19:24:06,562 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 19:24:06,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 19:24:06,566 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:06,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 19:24:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 19:24:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 19:24:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 19:24:06,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-03-20 19:24:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:06,592 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 19:24:06,592 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:24:06,593 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 19:24:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 19:24:06,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:06,594 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:06,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:24:06,594 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:06,595 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2022-03-20 19:24:06,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:06,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033385393] [2022-03-20 19:24:06,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 2 times [2022-03-20 19:24:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224985820] [2022-03-20 19:24:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:06,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:06,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30196774] [2022-03-20 19:24:06,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:06,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:06,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:06,616 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 19:24:06,617 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 19:24:06,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:24:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 19:24:06,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 19:24:06,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:06,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224985820] [2022-03-20 19:24:06,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:06,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30196774] [2022-03-20 19:24:06,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30196774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:06,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:06,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 19:24:06,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033385393] [2022-03-20 19:24:06,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033385393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:06,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:06,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:06,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666208608] [2022-03-20 19:24:06,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:06,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:24:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:24:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:24:06,947 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:24:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:07,023 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-03-20 19:24:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:24:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 19:24:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:07,025 INFO L225 Difference]: With dead ends: 49 [2022-03-20 19:24:07,025 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 19:24:07,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:07,028 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:07,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 144 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 19:24:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-03-20 19:24:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 19:24:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-20 19:24:07,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-03-20 19:24:07,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:07,052 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-20 19:24:07,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 19:24:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-20 19:24:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 19:24:07,054 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:07,054 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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 19:24:07,073 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 19:24:07,265 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 19:24:07,265 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2022-03-20 19:24:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:07,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629762870] [2022-03-20 19:24:07,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 2 times [2022-03-20 19:24:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:07,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72500199] [2022-03-20 19:24:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:07,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:07,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094960082] [2022-03-20 19:24:07,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:07,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:07,285 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 19:24:07,286 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 19:24:07,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 19:24:07,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 19:24:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 19:24:07,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:24:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72500199] [2022-03-20 19:24:07,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094960082] [2022-03-20 19:24:07,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094960082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:07,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:07,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:07,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:07,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629762870] [2022-03-20 19:24:07,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629762870] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:07,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:07,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:07,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062830779] [2022-03-20 19:24:07,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:07,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:24:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:07,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:24:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:24:07,401 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 19:24:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:07,437 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-03-20 19:24:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:24:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 19:24:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:07,438 INFO L225 Difference]: With dead ends: 47 [2022-03-20 19:24:07,438 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 19:24:07,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:24:07,439 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:07,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:07,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 19:24:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-20 19:24:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 19:24:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-03-20 19:24:07,446 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2022-03-20 19:24:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:07,446 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-03-20 19:24:07,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 19:24:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-03-20 19:24:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 19:24:07,447 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:07,447 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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 19:24:07,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 19:24:07,654 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 19:24:07,655 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:07,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:07,655 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2022-03-20 19:24:07,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:07,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351097709] [2022-03-20 19:24:07,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 2 times [2022-03-20 19:24:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:07,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129799037] [2022-03-20 19:24:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:07,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:07,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:07,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248967774] [2022-03-20 19:24:07,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:07,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:07,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:07,669 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 19:24:07,671 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 19:24:07,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 19:24:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 19:24:07,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 19:24:07,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129799037] [2022-03-20 19:24:07,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248967774] [2022-03-20 19:24:07,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248967774] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:07,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:07,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 19:24:07,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351097709] [2022-03-20 19:24:07,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351097709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:07,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:07,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:07,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657807260] [2022-03-20 19:24:07,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:07,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:24:07,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:24:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:07,943 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 19:24:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:07,972 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-03-20 19:24:07,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:24:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 39 [2022-03-20 19:24:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:07,974 INFO L225 Difference]: With dead ends: 55 [2022-03-20 19:24:07,974 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 19:24:07,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:24:07,975 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:07,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 19:24:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 19:24:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 19:24:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-03-20 19:24:07,983 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2022-03-20 19:24:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:07,983 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-03-20 19:24:07,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 19:24:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-03-20 19:24:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 19:24:07,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:07,984 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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 19:24:08,006 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 19:24:08,199 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 19:24:08,199 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2022-03-20 19:24:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:08,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217425221] [2022-03-20 19:24:08,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 2 times [2022-03-20 19:24:08,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:08,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774889810] [2022-03-20 19:24:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:08,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:08,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772150178] [2022-03-20 19:24:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:08,209 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 19:24:08,210 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 19:24:08,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:08,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:08,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 19:24:08,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-20 19:24:08,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 19:24:08,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:08,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774889810] [2022-03-20 19:24:08,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772150178] [2022-03-20 19:24:08,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772150178] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:08,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:08,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 19:24:08,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217425221] [2022-03-20 19:24:08,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217425221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:08,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:08,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169677124] [2022-03-20 19:24:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:08,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:24:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:24:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:08,473 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 19:24:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:08,512 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-03-20 19:24:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:24:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 44 [2022-03-20 19:24:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:08,515 INFO L225 Difference]: With dead ends: 59 [2022-03-20 19:24:08,515 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 19:24:08,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:24:08,518 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:08,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:08,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 19:24:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 19:24:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 19:24:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-03-20 19:24:08,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 44 [2022-03-20 19:24:08,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:08,535 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-03-20 19:24:08,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 19:24:08,535 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-03-20 19:24:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 19:24:08,536 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:08,537 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:08,555 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 19:24:08,747 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 19:24:08,747 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2022-03-20 19:24:08,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713805318] [2022-03-20 19:24:08,749 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:08,749 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 2 times [2022-03-20 19:24:08,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:08,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284585914] [2022-03-20 19:24:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:08,758 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:08,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092276688] [2022-03-20 19:24:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:08,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:08,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:08,761 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 19:24:08,761 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 19:24:08,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:08,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 19:24:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-20 19:24:08,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:09,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284585914] [2022-03-20 19:24:09,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:09,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092276688] [2022-03-20 19:24:09,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092276688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:09,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:09,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 19:24:09,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713805318] [2022-03-20 19:24:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713805318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:09,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:09,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:24:09,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315310106] [2022-03-20 19:24:09,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:09,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:24:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:24:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:09,071 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:24:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:09,147 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-03-20 19:24:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:24:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-03-20 19:24:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:09,149 INFO L225 Difference]: With dead ends: 63 [2022-03-20 19:24:09,149 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 19:24:09,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:24:09,149 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:09,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 19:24:09,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-20 19:24:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 19:24:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-03-20 19:24:09,158 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 49 [2022-03-20 19:24:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:09,158 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-03-20 19:24:09,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 19:24:09,158 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-03-20 19:24:09,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 19:24:09,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:09,159 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 19:24:09,175 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 19:24:09,375 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 19:24:09,376 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 1 times [2022-03-20 19:24:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:09,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561408938] [2022-03-20 19:24:09,377 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:09,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 2 times [2022-03-20 19:24:09,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:09,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640538072] [2022-03-20 19:24:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:09,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910306121] [2022-03-20 19:24:09,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:09,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:09,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:09,398 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 19:24:09,399 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 19:24:09,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:09,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 19:24:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 19:24:09,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-20 19:24:09,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640538072] [2022-03-20 19:24:09,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910306121] [2022-03-20 19:24:09,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910306121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:09,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:09,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 19:24:09,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:09,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561408938] [2022-03-20 19:24:09,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561408938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:09,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:09,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:24:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906195684] [2022-03-20 19:24:09,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:09,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:24:09,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:09,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:24:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:24:09,620 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:24:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:09,689 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-03-20 19:24:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:24:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 19:24:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:09,690 INFO L225 Difference]: With dead ends: 88 [2022-03-20 19:24:09,690 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 19:24:09,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 2 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 19:24:09,691 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:09,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 204 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 19:24:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-03-20 19:24:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 19:24:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-20 19:24:09,701 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2022-03-20 19:24:09,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:09,701 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-20 19:24:09,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:24:09,701 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-20 19:24:09,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 19:24:09,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:09,702 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-03-20 19:24:09,721 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 19:24:09,918 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 19:24:09,919 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2022-03-20 19:24:09,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658950396] [2022-03-20 19:24:09,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 2 times [2022-03-20 19:24:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:09,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434197379] [2022-03-20 19:24:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:09,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:09,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658269027] [2022-03-20 19:24:09,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:09,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:09,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:09,930 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 19:24:09,931 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 19:24:09,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:09,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 19:24:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 19:24:10,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 19:24:10,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434197379] [2022-03-20 19:24:10,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658269027] [2022-03-20 19:24:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658269027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:10,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:10,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 19:24:10,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:10,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658950396] [2022-03-20 19:24:10,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658950396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:10,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:10,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:24:10,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120928739] [2022-03-20 19:24:10,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:10,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:24:10,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:10,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:24:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:10,152 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 19:24:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:10,254 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2022-03-20 19:24:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:24:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-03-20 19:24:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:10,256 INFO L225 Difference]: With dead ends: 121 [2022-03-20 19:24:10,256 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:24:10,256 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:24:10,257 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:10,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 316 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:24:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-03-20 19:24:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 19:24:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-03-20 19:24:10,271 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2022-03-20 19:24:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:10,271 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-03-20 19:24:10,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 19:24:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-03-20 19:24:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 19:24:10,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:10,272 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-03-20 19:24:10,288 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 19:24:10,488 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 19:24:10,489 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2022-03-20 19:24:10,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:10,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1039602709] [2022-03-20 19:24:10,490 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 2 times [2022-03-20 19:24:10,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:10,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67109514] [2022-03-20 19:24:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:10,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:10,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:10,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564431579] [2022-03-20 19:24:10,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:10,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:10,497 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 19:24:10,498 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 19:24:10,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 19:24:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 19:24:10,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 19:24:10,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67109514] [2022-03-20 19:24:10,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564431579] [2022-03-20 19:24:10,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564431579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:10,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:10,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 19:24:10,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1039602709] [2022-03-20 19:24:10,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1039602709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:10,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:10,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:24:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93772548] [2022-03-20 19:24:10,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:10,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:24:10,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:10,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:24:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:24:10,843 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 19:24:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:10,978 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2022-03-20 19:24:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:24:10,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-03-20 19:24:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:10,979 INFO L225 Difference]: With dead ends: 147 [2022-03-20 19:24:10,979 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 19:24:10,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:24:10,980 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:10,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 215 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:10,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 19:24:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-03-20 19:24:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2022-03-20 19:24:10,996 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2022-03-20 19:24:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:10,997 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2022-03-20 19:24:10,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-03-20 19:24:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2022-03-20 19:24:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 19:24:10,997 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:10,998 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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 19:24:11,035 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 19:24:11,211 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 19:24:11,212 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:11,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 3 times [2022-03-20 19:24:11,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047841624] [2022-03-20 19:24:11,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 4 times [2022-03-20 19:24:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:11,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50250109] [2022-03-20 19:24:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:11,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526676841] [2022-03-20 19:24:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:11,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:11,220 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 19:24:11,221 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 19:24:11,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:11,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 19:24:11,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-20 19:24:11,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 19:24:11,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50250109] [2022-03-20 19:24:11,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:11,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526676841] [2022-03-20 19:24:11,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526676841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:11,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:11,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-03-20 19:24:11,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:11,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047841624] [2022-03-20 19:24:11,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047841624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:11,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:11,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:24:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744466322] [2022-03-20 19:24:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:11,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:24:11,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:24:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:24:11,854 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 19:24:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:12,057 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2022-03-20 19:24:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:24:12,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2022-03-20 19:24:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:12,059 INFO L225 Difference]: With dead ends: 153 [2022-03-20 19:24:12,059 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 19:24:12,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:24:12,060 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:12,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 292 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:12,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 19:24:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-03-20 19:24:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:12,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2022-03-20 19:24:12,082 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 69 [2022-03-20 19:24:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:12,082 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2022-03-20 19:24:12,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-20 19:24:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2022-03-20 19:24:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 19:24:12,084 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:12,084 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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 19:24:12,101 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 19:24:12,300 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 19:24:12,300 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 5 times [2022-03-20 19:24:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2142776178] [2022-03-20 19:24:12,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 6 times [2022-03-20 19:24:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689262941] [2022-03-20 19:24:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:12,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:12,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279295846] [2022-03-20 19:24:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:12,308 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 19:24:12,322 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 19:24:12,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:24:12,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:12,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 19:24:12,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-20 19:24:12,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:12,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689262941] [2022-03-20 19:24:12,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:12,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279295846] [2022-03-20 19:24:12,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279295846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:12,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:12,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 19:24:12,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:12,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2142776178] [2022-03-20 19:24:12,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2142776178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:12,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:12,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:24:12,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51631332] [2022-03-20 19:24:12,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:12,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:24:12,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:12,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:24:12,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:24:12,757 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 19:24:13,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:13,017 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2022-03-20 19:24:13,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:24:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-03-20 19:24:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:13,018 INFO L225 Difference]: With dead ends: 161 [2022-03-20 19:24:13,018 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 19:24:13,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:24:13,019 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:13,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 292 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:24:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 19:24:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-20 19:24:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 58 states have call successors, (58), 14 states have call predecessors, (58), 13 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-03-20 19:24:13,034 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 74 [2022-03-20 19:24:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:13,035 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-03-20 19:24:13,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-20 19:24:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-03-20 19:24:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 19:24:13,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:13,035 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-03-20 19:24:13,055 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 19:24:13,251 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 19:24:13,251 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 3 times [2022-03-20 19:24:13,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:13,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [77730787] [2022-03-20 19:24:13,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:13,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 4 times [2022-03-20 19:24:13,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:13,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858120224] [2022-03-20 19:24:13,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:13,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:13,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:13,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019771389] [2022-03-20 19:24:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:13,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:13,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:13,261 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 19:24:13,261 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 19:24:13,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 19:24:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-20 19:24:13,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-03-20 19:24:13,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858120224] [2022-03-20 19:24:13,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:13,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019771389] [2022-03-20 19:24:13,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019771389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:13,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:13,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-20 19:24:13,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [77730787] [2022-03-20 19:24:13,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [77730787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:13,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:13,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:24:13,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464237749] [2022-03-20 19:24:13,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:13,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:24:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:24:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:24:13,716 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:14,131 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2022-03-20 19:24:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:24:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-03-20 19:24:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:14,132 INFO L225 Difference]: With dead ends: 179 [2022-03-20 19:24:14,132 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 19:24:14,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:24:14,133 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:14,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 296 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 19:24:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-03-20 19:24:14,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 100 states have internal predecessors, (109), 62 states have call successors, (62), 16 states have call predecessors, (62), 15 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 19:24:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-03-20 19:24:14,158 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 78 [2022-03-20 19:24:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:14,158 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-03-20 19:24:14,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-03-20 19:24:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 19:24:14,159 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:14,159 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1] [2022-03-20 19:24:14,177 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 19:24:14,375 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 19:24:14,375 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:14,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2022-03-20 19:24:14,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:14,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089161469] [2022-03-20 19:24:14,376 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 2 times [2022-03-20 19:24:14,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:14,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146924586] [2022-03-20 19:24:14,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:14,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:14,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:14,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032338749] [2022-03-20 19:24:14,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:14,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:14,383 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 19:24:14,384 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 19:24:14,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:14,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 19:24:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 19:24:14,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-20 19:24:16,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146924586] [2022-03-20 19:24:16,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032338749] [2022-03-20 19:24:16,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032338749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:16,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:16,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-20 19:24:16,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089161469] [2022-03-20 19:24:16,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089161469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:16,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:16,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:24:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732305051] [2022-03-20 19:24:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:16,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:24:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:24:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:24:16,177 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:16,726 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2022-03-20 19:24:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:24:16,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 19:24:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:16,728 INFO L225 Difference]: With dead ends: 196 [2022-03-20 19:24:16,728 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 19:24:16,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:24:16,729 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:16,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 339 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:24:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 19:24:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-20 19:24:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 112 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-20 19:24:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2022-03-20 19:24:16,746 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 80 [2022-03-20 19:24:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:16,747 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2022-03-20 19:24:16,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 19:24:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2022-03-20 19:24:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 19:24:16,747 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:16,748 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 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] [2022-03-20 19:24:16,764 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 19:24:16,964 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 19:24:16,964 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 7 times [2022-03-20 19:24:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666757810] [2022-03-20 19:24:16,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 8 times [2022-03-20 19:24:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567756738] [2022-03-20 19:24:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:16,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:16,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455991414] [2022-03-20 19:24:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:16,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:16,972 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 19:24:16,973 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 19:24:17,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:17,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 19:24:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-03-20 19:24:17,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 19:24:17,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567756738] [2022-03-20 19:24:17,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:17,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455991414] [2022-03-20 19:24:17,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455991414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:17,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:17,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:17,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:17,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666757810] [2022-03-20 19:24:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666757810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:17,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:17,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653439826] [2022-03-20 19:24:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:17,111 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:24:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:24:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:24:17,112 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 19:24:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:17,168 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2022-03-20 19:24:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:24:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2022-03-20 19:24:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:17,169 INFO L225 Difference]: With dead ends: 234 [2022-03-20 19:24:17,169 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 19:24:17,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 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 19:24:17,170 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:17,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 168 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 19:24:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2022-03-20 19:24:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 1.10989010989011) internal successors, (101), 98 states have internal predecessors, (101), 58 states have call successors, (58), 17 states have call predecessors, (58), 16 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 214 transitions. [2022-03-20 19:24:17,196 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 214 transitions. Word has length 89 [2022-03-20 19:24:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:17,197 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 214 transitions. [2022-03-20 19:24:17,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-20 19:24:17,197 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 214 transitions. [2022-03-20 19:24:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 19:24:17,197 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:17,198 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:17,216 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 19:24:17,411 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 19:24:17,411 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2022-03-20 19:24:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:17,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [109780243] [2022-03-20 19:24:17,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:17,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 2 times [2022-03-20 19:24:17,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:17,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358887134] [2022-03-20 19:24:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:17,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753158702] [2022-03-20 19:24:17,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:24:17,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:17,421 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 19:24:17,421 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 19:24:17,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:24:17,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 19:24:17,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 28 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-20 19:24:18,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:22,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:22,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358887134] [2022-03-20 19:24:22,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:22,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753158702] [2022-03-20 19:24:22,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753158702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:22,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:22,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-20 19:24:22,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:22,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [109780243] [2022-03-20 19:24:22,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [109780243] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:22,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:22,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:24:22,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801120739] [2022-03-20 19:24:22,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:22,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:24:22,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:24:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=234, Unknown=1, NotChecked=0, Total=306 [2022-03-20 19:24:22,083 INFO L87 Difference]: Start difference. First operand 166 states and 214 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 19:24:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:22,764 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2022-03-20 19:24:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:24:22,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2022-03-20 19:24:22,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:22,766 INFO L225 Difference]: With dead ends: 181 [2022-03-20 19:24:22,766 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 19:24:22,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=112, Invalid=393, Unknown=1, NotChecked=0, Total=506 [2022-03-20 19:24:22,767 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:22,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 404 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:24:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 19:24:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-20 19:24:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.1) internal successors, (110), 107 states have internal predecessors, (110), 58 states have call successors, (58), 20 states have call predecessors, (58), 19 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2022-03-20 19:24:22,783 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 96 [2022-03-20 19:24:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:22,783 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2022-03-20 19:24:22,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 19:24:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2022-03-20 19:24:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 19:24:22,784 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:22,784 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:22,803 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 19:24:22,995 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 19:24:22,995 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 5 times [2022-03-20 19:24:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1199619706] [2022-03-20 19:24:22,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:22,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 6 times [2022-03-20 19:24:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837216039] [2022-03-20 19:24:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:22,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:23,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:23,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042275216] [2022-03-20 19:24:23,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:23,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:23,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:23,005 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 19:24:23,006 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 19:24:23,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-20 19:24:23,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 19:24:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 19:24:23,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-20 19:24:23,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:23,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837216039] [2022-03-20 19:24:23,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042275216] [2022-03-20 19:24:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042275216] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:23,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:23,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-20 19:24:23,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:23,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1199619706] [2022-03-20 19:24:23,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1199619706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:23,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:23,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 19:24:23,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565447154] [2022-03-20 19:24:23,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:23,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 19:24:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:23,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 19:24:23,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:24:23,414 INFO L87 Difference]: Start difference. First operand 178 states and 223 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:24:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:23,452 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2022-03-20 19:24:23,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 19:24:23,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 100 [2022-03-20 19:24:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:23,455 INFO L225 Difference]: With dead ends: 184 [2022-03-20 19:24:23,455 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 19:24:23,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:24:23,456 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:23,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:24:23,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 19:24:23,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 19:24:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 110 states have internal predecessors, (113), 58 states have call successors, (58), 21 states have call predecessors, (58), 20 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 19:24:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-03-20 19:24:23,477 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 100 [2022-03-20 19:24:23,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:23,477 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-03-20 19:24:23,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 19:24:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-03-20 19:24:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 19:24:23,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:23,478 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 19:24:23,494 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 19:24:23,682 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 19:24:23,683 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 3 times [2022-03-20 19:24:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288599845] [2022-03-20 19:24:23,683 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 4 times [2022-03-20 19:24:23,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134004358] [2022-03-20 19:24:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:23,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:23,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026904096] [2022-03-20 19:24:23,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:23,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:23,690 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 19:24:23,691 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 19:24:23,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:23,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:23,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 19:24:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:24,149 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:24:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 19:24:24,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:24,777 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:24:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134004358] [2022-03-20 19:24:25,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:25,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026904096] [2022-03-20 19:24:25,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026904096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:24:25,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:24:25,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-20 19:24:25,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288599845] [2022-03-20 19:24:25,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288599845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:25,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:25,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:24:25,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072420439] [2022-03-20 19:24:25,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:25,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:24:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:24:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:24:25,125 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 19:24:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:25,740 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2022-03-20 19:24:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:24:25,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2022-03-20 19:24:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:25,743 INFO L225 Difference]: With dead ends: 211 [2022-03-20 19:24:25,743 INFO L226 Difference]: Without dead ends: 208 [2022-03-20 19:24:25,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:24:25,744 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:25,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 413 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:24:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-20 19:24:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-03-20 19:24:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 122 states have internal predecessors, (127), 70 states have call successors, (70), 22 states have call predecessors, (70), 21 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 19:24:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2022-03-20 19:24:25,766 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 102 [2022-03-20 19:24:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:25,767 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2022-03-20 19:24:25,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 19:24:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2022-03-20 19:24:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:24:25,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:25,768 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:25,786 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 19:24:25,981 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 19:24:25,981 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:25,981 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 5 times [2022-03-20 19:24:25,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:25,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092324720] [2022-03-20 19:24:25,982 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 6 times [2022-03-20 19:24:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:25,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109373744] [2022-03-20 19:24:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:25,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518738939] [2022-03-20 19:24:25,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:25,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:25,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:25,988 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 19:24:25,989 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 19:24:26,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:24:26,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 19:24:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 19:24:26,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 19:24:26,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109373744] [2022-03-20 19:24:26,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:26,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518738939] [2022-03-20 19:24:26,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518738939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:26,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:26,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-20 19:24:26,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:26,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092324720] [2022-03-20 19:24:26,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092324720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:26,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:26,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:24:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237514627] [2022-03-20 19:24:26,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:26,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:24:26,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:24:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:24:26,300 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 19:24:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:26,488 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2022-03-20 19:24:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:24:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-03-20 19:24:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:26,490 INFO L225 Difference]: With dead ends: 257 [2022-03-20 19:24:26,490 INFO L226 Difference]: Without dead ends: 249 [2022-03-20 19:24:26,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:24:26,491 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:26,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 329 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:24:26,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-20 19:24:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 230. [2022-03-20 19:24:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 125 states have internal predecessors, (140), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 19:24:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 307 transitions. [2022-03-20 19:24:26,532 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 307 transitions. Word has length 105 [2022-03-20 19:24:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:26,532 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 307 transitions. [2022-03-20 19:24:26,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-20 19:24:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 307 transitions. [2022-03-20 19:24:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 19:24:26,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:26,533 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:26,559 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 19:24:26,750 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 19:24:26,751 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:26,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 3 times [2022-03-20 19:24:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:26,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110804189] [2022-03-20 19:24:26,751 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 4 times [2022-03-20 19:24:26,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:26,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755466376] [2022-03-20 19:24:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:26,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:26,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535138248] [2022-03-20 19:24:26,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:24:26,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:26,758 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 19:24:26,759 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 19:24:26,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:24:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 19:24:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-20 19:24:29,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:24:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 19:24:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:24:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755466376] [2022-03-20 19:24:29,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:24:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535138248] [2022-03-20 19:24:29,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535138248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:24:29,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:24:29,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2022-03-20 19:24:29,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:24:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110804189] [2022-03-20 19:24:29,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110804189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:24:29,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:24:29,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:24:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066055055] [2022-03-20 19:24:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:24:29,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:24:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:24:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:24:29,590 INFO L87 Difference]: Start difference. First operand 230 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 19:24:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:24:32,423 INFO L93 Difference]: Finished difference Result 260 states and 350 transitions. [2022-03-20 19:24:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:24:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2022-03-20 19:24:32,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:24:32,425 INFO L225 Difference]: With dead ends: 260 [2022-03-20 19:24:32,425 INFO L226 Difference]: Without dead ends: 258 [2022-03-20 19:24:32,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:24:32,426 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:24:32,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 510 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 19:24:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-20 19:24:32,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-03-20 19:24:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 137 states have internal predecessors, (154), 97 states have call successors, (97), 23 states have call predecessors, (97), 22 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 19:24:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 345 transitions. [2022-03-20 19:24:32,454 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 345 transitions. Word has length 111 [2022-03-20 19:24:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:24:32,455 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 345 transitions. [2022-03-20 19:24:32,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-03-20 19:24:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 345 transitions. [2022-03-20 19:24:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 19:24:32,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:24:32,456 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:24:32,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 19:24:32,663 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 19:24:32,663 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:24:32,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:24:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 5 times [2022-03-20 19:24:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:24:32,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1459539071] [2022-03-20 19:24:32,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:24:32,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 6 times [2022-03-20 19:24:32,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:24:32,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254246408] [2022-03-20 19:24:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:24:32,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:24:32,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:24:32,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45223034] [2022-03-20 19:24:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 19:24:32,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:24:32,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:24:32,671 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 19:24:32,672 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 19:24:32,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 19:24:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:24:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 19:24:32,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:24:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 129 proven. 56 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 19:24:35,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:28,816 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~yy~0_BEFORE_CALL_39 Int) (v_main_~x~0_BEFORE_CALL_151 Int) (v_main_~y~0_BEFORE_CALL_157 Int) (v_main_~s~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_120 Int) (v_main_~xy~0_BEFORE_CALL_29 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_157 (+ (* v_main_~y~0_BEFORE_CALL_157 v_main_~s~0_BEFORE_CALL_123) (* v_main_~x~0_BEFORE_CALL_151 v_main_~q~0_BEFORE_CALL_120))))) (let ((.cse1 (+ .cse0 (* (- 1) v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123)))) (or (not (= (+ (* (- 1) .cse0) (* v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123) (* v_main_~xy~0_BEFORE_CALL_29 v_main_~q~0_BEFORE_CALL_120)) 0)) (= (mod .cse1 v_main_~q~0_BEFORE_CALL_120) 0) (= .cse1 0))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-20 19:26:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 137 proven. 38 refuted. 5 times theorem prover too weak. 272 trivial. 1 not checked. [2022-03-20 19:26:30,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254246408] [2022-03-20 19:26:30,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45223034] [2022-03-20 19:26:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45223034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:26:30,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:26:30,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-03-20 19:26:30,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:30,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1459539071] [2022-03-20 19:26:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1459539071] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:30,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:30,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:26:30,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862723912] [2022-03-20 19:26:30,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:30,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:26:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:26:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=643, Unknown=7, NotChecked=52, Total=812 [2022-03-20 19:26:30,965 INFO L87 Difference]: Start difference. First operand 255 states and 345 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:26:42,406 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 19:26:44,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 19:26:46,095 WARN L534 Checker$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 19:26:46,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:46,808 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2022-03-20 19:26:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:26:46,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-03-20 19:26:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:46,810 INFO L225 Difference]: With dead ends: 280 [2022-03-20 19:26:46,810 INFO L226 Difference]: Without dead ends: 278 [2022-03-20 19:26:46,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=186, Invalid=1139, Unknown=11, NotChecked=70, Total=1406 [2022-03-20 19:26:46,811 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:46,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 572 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 727 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-03-20 19:26:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-20 19:26:46,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-03-20 19:26:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 152 states have internal predecessors, (169), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 19:26:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 360 transitions. [2022-03-20 19:26:46,850 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 360 transitions. Word has length 116 [2022-03-20 19:26:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:46,851 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 360 transitions. [2022-03-20 19:26:46,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-20 19:26:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 360 transitions. [2022-03-20 19:26:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 19:26:46,853 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:46,853 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 19:26:46,872 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 19:26:47,070 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 19:26:47,070 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 7 times [2022-03-20 19:26:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:47,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624745974] [2022-03-20 19:26:47,071 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:47,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 8 times [2022-03-20 19:26:47,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:47,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257267829] [2022-03-20 19:26:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:47,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:47,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813516821] [2022-03-20 19:26:47,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:47,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:47,077 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 19:26:47,078 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 19:26:47,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 19:26:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:48,700 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:49,335 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 153 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-03-20 19:26:49,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:50,466 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:26:53,972 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse8 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse9 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse9 c_main_~y~0)) (.cse1 (* .cse8 c_main_~x~0)) (.cse2 (* c_main_~q~0 c_main_~x~0)) (.cse3 (* c_main_~s~0 c_main_~y~0))) (or (not (= c_main_~c~0 (+ .cse0 .cse1))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 (+ .cse2 .cse3))) (let ((.cse4 (= c_main_~s~0 0)) (.cse5 (+ (* (- 1) c_main_~b~0) .cse2 .cse3 (* c_main_~b~0 c_main_~y~0) (* (- 1) c_main_~q~0 c_main_~xy~0)))) (and (or (not .cse4) (not (= .cse5 0)) (forall ((main_~yy~0 Int)) (let ((.cse6 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0)))) (.cse7 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0)))) (= (+ (* .cse6 c_main_~y~0) (* .cse7 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* main_~yy~0 .cse6) (* c_main_~xy~0 .cse7) c_main_~c~0))))) (or .cse4 (not (= (mod .cse5 c_main_~s~0) 0)) (= (+ (* c_main_~xy~0 .cse8) c_main_~c~0 (* (div .cse5 c_main_~s~0) .cse9)) (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0))))))))) is different from true [2022-03-20 19:26:53,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257267829] [2022-03-20 19:26:53,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813516821] [2022-03-20 19:26:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813516821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:26:53,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:26:53,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-20 19:26:53,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:53,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624745974] [2022-03-20 19:26:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624745974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:53,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:53,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:26:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93277008] [2022-03-20 19:26:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:53,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:26:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:53,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:26:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=462, Unknown=1, NotChecked=44, Total=600 [2022-03-20 19:26:53,975 INFO L87 Difference]: Start difference. First operand 275 states and 360 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 19:26:55,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:55,479 INFO L93 Difference]: Finished difference Result 287 states and 370 transitions. [2022-03-20 19:26:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:26:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 118 [2022-03-20 19:26:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:55,481 INFO L225 Difference]: With dead ends: 287 [2022-03-20 19:26:55,481 INFO L226 Difference]: Without dead ends: 285 [2022-03-20 19:26:55,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=144, Invalid=729, Unknown=1, NotChecked=56, Total=930 [2022-03-20 19:26:55,482 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:55,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 392 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:26:55,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-20 19:26:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-03-20 19:26:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 158 states have internal predecessors, (175), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 19:26:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 366 transitions. [2022-03-20 19:26:55,523 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 366 transitions. Word has length 118 [2022-03-20 19:26:55,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:55,523 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 366 transitions. [2022-03-20 19:26:55,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 19:26:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 366 transitions. [2022-03-20 19:26:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 19:26:55,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:55,524 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:26:55,543 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 19:26:55,735 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 19:26:55,735 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 9 times [2022-03-20 19:26:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:55,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297962700] [2022-03-20 19:26:55,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 10 times [2022-03-20 19:26:55,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531386584] [2022-03-20 19:26:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:55,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:55,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:55,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305644256] [2022-03-20 19:26:55,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:26:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:55,743 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 19:26:55,744 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 19:26:55,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:26:55,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 19:26:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:26:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 109 proven. 111 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-03-20 19:26:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:26:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:26:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531386584] [2022-03-20 19:26:58,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:26:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305644256] [2022-03-20 19:26:58,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305644256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 19:26:58,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 19:26:58,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 19:26:58,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:26:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297962700] [2022-03-20 19:26:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297962700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:26:58,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:26:58,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:26:58,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447662098] [2022-03-20 19:26:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:26:58,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:26:58,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:26:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:26:58,518 INFO L87 Difference]: Start difference. First operand 283 states and 366 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 19:26:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:26:59,247 INFO L93 Difference]: Finished difference Result 300 states and 380 transitions. [2022-03-20 19:26:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:26:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 121 [2022-03-20 19:26:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:26:59,249 INFO L225 Difference]: With dead ends: 300 [2022-03-20 19:26:59,249 INFO L226 Difference]: Without dead ends: 298 [2022-03-20 19:26:59,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:26:59,250 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:26:59,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 514 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:26:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-20 19:26:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-03-20 19:26:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 167 states have internal predecessors, (184), 97 states have call successors, (97), 33 states have call predecessors, (97), 32 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 19:26:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 375 transitions. [2022-03-20 19:26:59,287 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 375 transitions. Word has length 121 [2022-03-20 19:26:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:26:59,287 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 375 transitions. [2022-03-20 19:26:59,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 19:26:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 375 transitions. [2022-03-20 19:26:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 19:26:59,288 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:26:59,288 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 19:26:59,307 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 19:26:59,503 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 19:26:59,504 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:26:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:26:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 7 times [2022-03-20 19:26:59,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:26:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89136066] [2022-03-20 19:26:59,505 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:26:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 8 times [2022-03-20 19:26:59,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:26:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292675524] [2022-03-20 19:26:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:26:59,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:26:59,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:26:59,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465916673] [2022-03-20 19:26:59,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 19:26:59,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:26:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:26:59,514 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 19:26:59,515 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 19:26:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 19:26:59,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:26:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 19:26:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 57 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-03-20 19:27:01,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 19:27:02,030 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 48 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-20 19:27:09,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:27:09,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292675524] [2022-03-20 19:27:09,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 19:27:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465916673] [2022-03-20 19:27:09,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465916673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 19:27:09,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 19:27:09,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-03-20 19:27:09,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:27:09,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89136066] [2022-03-20 19:27:09,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89136066] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:27:09,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:27:09,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:27:09,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386759277] [2022-03-20 19:27:09,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:27:09,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:27:09,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:27:09,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2022-03-20 19:27:09,442 INFO L87 Difference]: Start difference. First operand 295 states and 375 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 19:27:11,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:27:11,186 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-03-20 19:27:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:27:11,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 124 [2022-03-20 19:27:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:27:11,188 INFO L225 Difference]: With dead ends: 331 [2022-03-20 19:27:11,188 INFO L226 Difference]: Without dead ends: 328 [2022-03-20 19:27:11,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=176, Invalid=943, Unknown=3, NotChecked=0, Total=1122 [2022-03-20 19:27:11,188 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:27:11,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 332 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 19:27:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-20 19:27:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-03-20 19:27:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 181 states have internal predecessors, (201), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-03-20 19:27:11,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 424 transitions. [2022-03-20 19:27:11,228 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 424 transitions. Word has length 124 [2022-03-20 19:27:11,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:27:11,228 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 424 transitions. [2022-03-20 19:27:11,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 19:27:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 424 transitions. [2022-03-20 19:27:11,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:27:11,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:27:11,229 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 19:27:11,248 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 19:27:11,443 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 19:27:11,443 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:27:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:27:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 9 times [2022-03-20 19:27:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:27:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [688381894] [2022-03-20 19:27:11,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:27:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 10 times [2022-03-20 19:27:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:27:11,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689586697] [2022-03-20 19:27:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:27:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:27:11,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 19:27:11,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216121876] [2022-03-20 19:27:11,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 19:27:11,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 19:27:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:27:11,456 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 19:27:11,457 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 19:27:11,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 19:27:11,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 19:27:11,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 19:27:11,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 19:27:14,769 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:14,771 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:14,773 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:14,775 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:14,781 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:14,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 19:27:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 165 proven. 84 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-20 19:27:15,471 INFO L328 TraceCheckSpWp]: Computing backward predicates...