/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:31:08,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:31:08,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:31:08,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:31:08,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:31:08,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:31:08,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:31:08,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:31:08,571 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:31:08,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:31:08,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:31:08,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:31:08,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:31:08,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:31:08,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:31:08,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:31:08,574 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:31:08,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:31:08,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:31:08,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:31:08,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:31:08,799 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:31:08,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2022-04-06 21:31:08,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4261ad2e7/1c21aeba038b4cfab58157c0d644b059/FLAGa38fa24f7 [2022-04-06 21:31:09,184 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:31:09,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c [2022-04-06 21:31:09,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4261ad2e7/1c21aeba038b4cfab58157c0d644b059/FLAGa38fa24f7 [2022-04-06 21:31:09,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4261ad2e7/1c21aeba038b4cfab58157c0d644b059 [2022-04-06 21:31:09,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:31:09,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:31:09,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:31:09,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:31:09,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:31:09,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613eb211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09, skipping insertion in model container [2022-04-06 21:31:09,642 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:31:09,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:31:09,784 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c[597,610] [2022-04-06 21:31:09,799 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:31:09,808 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:31:09,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound100.c[597,610] [2022-04-06 21:31:09,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:31:09,840 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:31:09,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09 WrapperNode [2022-04-06 21:31:09,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:31:09,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:31:09,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:31:09,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:31:09,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:31:09,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:31:09,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:31:09,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:31:09,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (1/1) ... [2022-04-06 21:31:09,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:31:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:09,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:31:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:31:09,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:31:09,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:31:09,928 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:31:09,929 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:31:09,929 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:31:09,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:31:09,929 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:31:09,929 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:31:09,930 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:31:09,930 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:31:09,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:31:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:31:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:31:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:31:09,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:31:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:31:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:31:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:31:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:31:09,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:31:09,972 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:31:09,973 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:31:10,119 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:31:10,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:31:10,123 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:31:10,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:31:10 BoogieIcfgContainer [2022-04-06 21:31:10,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:31:10,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:31:10,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:31:10,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:31:10,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:31:09" (1/3) ... [2022-04-06 21:31:10,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4cab76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:31:10, skipping insertion in model container [2022-04-06 21:31:10,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:31:09" (2/3) ... [2022-04-06 21:31:10,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b4cab76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:31:10, skipping insertion in model container [2022-04-06 21:31:10,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:31:10" (3/3) ... [2022-04-06 21:31:10,130 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound100.c [2022-04-06 21:31:10,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:31:10,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:31:10,192 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:31:10,198 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:31:10,198 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:31:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:31:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:31:10,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:10,221 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:10,221 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 1 times [2022-04-06 21:31:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623914794] [2022-04-06 21:31:10,243 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1867489771, now seen corresponding path program 2 times [2022-04-06 21:31:10,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:10,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092119073] [2022-04-06 21:31:10,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:10,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:31:10,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:31:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:31:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:31:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:31:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 21:31:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:31:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:31:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:10,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092119073] [2022-04-06 21:31:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092119073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:10,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:10,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:31:10,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:10,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623914794] [2022-04-06 21:31:10,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623914794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:10,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:10,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:31:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067548505] [2022-04-06 21:31:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:10,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:31:10,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:31:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:31:10,466 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:31:10,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:10,531 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-04-06 21:31:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:31:10,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 21:31:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:10,542 INFO L225 Difference]: With dead ends: 57 [2022-04-06 21:31:10,542 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 21:31:10,545 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:31:10,548 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:10,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:31:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 21:31:10,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 21:31:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 21:31:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-06 21:31:10,579 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-04-06 21:31:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:10,580 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-06 21:31:10,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:31:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-06 21:31:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:31:10,582 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:10,583 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:10,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:31:10,583 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 1 times [2022-04-06 21:31:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220273167] [2022-04-06 21:31:10,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1827672217, now seen corresponding path program 2 times [2022-04-06 21:31:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302874394] [2022-04-06 21:31:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:10,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:10,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399451584] [2022-04-06 21:31:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:10,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:10,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:10,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:31:10,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:31:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:31:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:31:10,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:31:10,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302874394] [2022-04-06 21:31:10,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399451584] [2022-04-06 21:31:10,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399451584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:10,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:10,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:31:10,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1220273167] [2022-04-06 21:31:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1220273167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:10,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:10,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:31:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412646463] [2022-04-06 21:31:10,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:10,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:31:10,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:31:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:31:10,822 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:31:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:10,898 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-04-06 21:31:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:31:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 21:31:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:10,900 INFO L225 Difference]: With dead ends: 39 [2022-04-06 21:31:10,900 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:31:10,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:31:10,901 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:10,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:31:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:31:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 21:31:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 21:31:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-04-06 21:31:10,908 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-04-06 21:31:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:10,909 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-04-06 21:31:10,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:31:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-04-06 21:31:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:31:10,910 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:10,910 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:10,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:11,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:11,129 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:11,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 1 times [2022-04-06 21:31:11,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:11,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560661387] [2022-04-06 21:31:11,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1419291471, now seen corresponding path program 2 times [2022-04-06 21:31:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:11,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275819046] [2022-04-06 21:31:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:11,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:11,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:11,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506572697] [2022-04-06 21:31:11,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:11,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:11,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:11,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:11,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:31:11,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:11,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:31:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:31:11,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:31:11,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:11,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275819046] [2022-04-06 21:31:11,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:11,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506572697] [2022-04-06 21:31:11,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506572697] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:11,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:11,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-04-06 21:31:11,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560661387] [2022-04-06 21:31:11,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560661387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:11,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:11,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:31:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925570630] [2022-04-06 21:31:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:11,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:31:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:31:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:31:11,596 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:31:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:11,740 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-04-06 21:31:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:31:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-04-06 21:31:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:11,743 INFO L225 Difference]: With dead ends: 48 [2022-04-06 21:31:11,743 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 21:31:11,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:31:11,749 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:11,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:31:11,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 21:31:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 21:31:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:31:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-06 21:31:11,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2022-04-06 21:31:11,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:11,758 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-06 21:31:11,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:31:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-06 21:31:11,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:31:11,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:11,759 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:11,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:11,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:31:11,978 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 1 times [2022-04-06 21:31:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:11,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751530630] [2022-04-06 21:31:11,979 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 355715891, now seen corresponding path program 2 times [2022-04-06 21:31:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:11,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795479754] [2022-04-06 21:31:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:11,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:11,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548932387] [2022-04-06 21:31:11,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:11,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:11,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:11,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:11,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:31:12,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:12,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:31:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:31:12,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:31:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795479754] [2022-04-06 21:31:12,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548932387] [2022-04-06 21:31:12,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548932387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:12,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:12,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-04-06 21:31:12,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:12,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751530630] [2022-04-06 21:31:12,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751530630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:12,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:12,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:31:12,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970835394] [2022-04-06 21:31:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:12,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:31:12,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:31:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:31:12,342 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:31:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:12,448 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2022-04-06 21:31:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:31:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-04-06 21:31:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:12,450 INFO L225 Difference]: With dead ends: 56 [2022-04-06 21:31:12,450 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:31:12,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:31:12,451 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:12,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 155 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:31:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:31:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-04-06 21:31:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:31:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-04-06 21:31:12,472 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-04-06 21:31:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:12,473 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-04-06 21:31:12,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:31:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-04-06 21:31:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 21:31:12,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:12,474 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:12,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:12,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:12,679 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 1 times [2022-04-06 21:31:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:12,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6485249] [2022-04-06 21:31:12,680 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash 125050924, now seen corresponding path program 2 times [2022-04-06 21:31:12,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:12,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670784015] [2022-04-06 21:31:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:12,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:12,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518988989] [2022-04-06 21:31:12,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:12,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:12,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:31:12,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:12,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:12,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:31:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:12,917 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:12,921 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:12,926 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:31:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:31:14,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670784015] [2022-04-06 21:31:14,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518988989] [2022-04-06 21:31:14,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518988989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:14,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:14,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-04-06 21:31:14,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:14,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6485249] [2022-04-06 21:31:14,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6485249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:14,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:14,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:31:14,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970965537] [2022-04-06 21:31:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:14,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:31:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:31:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:31:14,246 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:16,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:18,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:20,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:20,797 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-04-06 21:31:20,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:31:20,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2022-04-06 21:31:20,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:20,798 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:31:20,798 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 21:31:20,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:31:20,799 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:20,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 191 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 249 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2022-04-06 21:31:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 21:31:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2022-04-06 21:31:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 21:31:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-06 21:31:20,805 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2022-04-06 21:31:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:20,806 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-06 21:31:20,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-06 21:31:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:31:20,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:20,806 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:20,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:21,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:21,024 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 3 times [2022-04-06 21:31:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1793289690] [2022-04-06 21:31:21,025 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash 733948825, now seen corresponding path program 4 times [2022-04-06 21:31:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036077164] [2022-04-06 21:31:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:21,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:21,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331485547] [2022-04-06 21:31:21,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:31:21,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:21,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:21,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:21,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:31:21,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:31:21,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 21:31:21,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:21,259 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:31:21,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:31:21,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:21,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036077164] [2022-04-06 21:31:21,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331485547] [2022-04-06 21:31:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331485547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:21,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:21,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:31:21,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1793289690] [2022-04-06 21:31:21,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1793289690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:21,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:21,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:31:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283514314] [2022-04-06 21:31:21,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:21,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:31:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:31:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:31:21,577 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:21,979 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-04-06 21:31:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:31:21,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 21:31:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:21,981 INFO L225 Difference]: With dead ends: 61 [2022-04-06 21:31:21,981 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 21:31:21,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:31:21,982 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:21,982 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 187 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:31:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 21:31:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-04-06 21:31:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:31:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-04-06 21:31:21,990 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 41 [2022-04-06 21:31:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:21,990 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-04-06 21:31:21,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-04-06 21:31:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:31:21,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:21,991 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:22,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:22,208 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 1 times [2022-04-06 21:31:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675671358] [2022-04-06 21:31:22,208 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1786011109, now seen corresponding path program 2 times [2022-04-06 21:31:22,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:22,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320343661] [2022-04-06 21:31:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:22,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:22,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:22,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875111019] [2022-04-06 21:31:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:22,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:22,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:22,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:22,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:31:22,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:31:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:31:22,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:31:22,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320343661] [2022-04-06 21:31:22,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:22,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875111019] [2022-04-06 21:31:22,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875111019] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:22,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:31:22,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:22,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675671358] [2022-04-06 21:31:22,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675671358] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:22,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:22,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:31:22,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723292308] [2022-04-06 21:31:22,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:22,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:31:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:31:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:31:22,670 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:22,849 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-04-06 21:31:22,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:31:22,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 21:31:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:22,851 INFO L225 Difference]: With dead ends: 72 [2022-04-06 21:31:22,852 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 21:31:22,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:31:22,852 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:22,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 186 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:31:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 21:31:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2022-04-06 21:31:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 21:31:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-04-06 21:31:22,861 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 41 [2022-04-06 21:31:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:22,861 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-04-06 21:31:22,861 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-04-06 21:31:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:31:22,862 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:22,862 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:22,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 21:31:23,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:23,079 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:23,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:23,079 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 3 times [2022-04-06 21:31:23,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1026711559] [2022-04-06 21:31:23,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -287119529, now seen corresponding path program 4 times [2022-04-06 21:31:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:23,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467155022] [2022-04-06 21:31:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:23,091 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1758902313] [2022-04-06 21:31:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:31:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:23,093 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:23,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:31:23,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:31:23,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:31:23,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:23,411 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:23,417 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:31:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 21:31:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467155022] [2022-04-06 21:31:26,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758902313] [2022-04-06 21:31:26,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758902313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:26,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:26,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-04-06 21:31:26,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1026711559] [2022-04-06 21:31:26,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1026711559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:26,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:26,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:31:26,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498350464] [2022-04-06 21:31:26,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:26,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:31:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:31:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=319, Unknown=1, NotChecked=0, Total=380 [2022-04-06 21:31:26,071 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:28,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:30,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:32,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:36,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:38,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:38,671 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-04-06 21:31:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:31:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 21:31:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:38,672 INFO L225 Difference]: With dead ends: 86 [2022-04-06 21:31:38,672 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 21:31:38,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=98, Invalid=500, Unknown=2, NotChecked=0, Total=600 [2022-04-06 21:31:38,673 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 8 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:38,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 263 Invalid, 5 Unknown, 0 Unchecked, 10.3s Time] [2022-04-06 21:31:38,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 21:31:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 21:31:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:31:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-04-06 21:31:38,685 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 41 [2022-04-06 21:31:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:38,685 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-04-06 21:31:38,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 13 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-04-06 21:31:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:31:38,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:38,686 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:38,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:38,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:38,890 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 3 times [2022-04-06 21:31:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1327948364] [2022-04-06 21:31:38,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:38,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1487887833, now seen corresponding path program 4 times [2022-04-06 21:31:38,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411440480] [2022-04-06 21:31:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:38,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:38,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46648725] [2022-04-06 21:31:38,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:31:38,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:38,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:38,899 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:38,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:31:38,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:31:38,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:38,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:31:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:31:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-04-06 21:31:39,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411440480] [2022-04-06 21:31:39,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46648725] [2022-04-06 21:31:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46648725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:39,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:39,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 21:31:39,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1327948364] [2022-04-06 21:31:39,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1327948364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:39,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:39,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 21:31:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839534913] [2022-04-06 21:31:39,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:39,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 21:31:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 21:31:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:31:39,413 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:39,617 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-04-06 21:31:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:31:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-04-06 21:31:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:39,619 INFO L225 Difference]: With dead ends: 86 [2022-04-06 21:31:39,619 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 21:31:39,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:31:39,621 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:39,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 201 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:31:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 21:31:39,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-04-06 21:31:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:31:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-04-06 21:31:39,642 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 41 [2022-04-06 21:31:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:39,642 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-04-06 21:31:39,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 21:31:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-04-06 21:31:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:31:39,644 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:39,644 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:39,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 21:31:39,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 21:31:39,848 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 651179076, now seen corresponding path program 1 times [2022-04-06 21:31:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:39,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501132963] [2022-04-06 21:31:39,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:39,849 INFO L85 PathProgramCache]: Analyzing trace with hash 651179076, now seen corresponding path program 2 times [2022-04-06 21:31:39,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:39,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851146810] [2022-04-06 21:31:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:39,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:39,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:39,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176834847] [2022-04-06 21:31:39,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:39,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:39,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:39,870 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:39,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:31:39,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 21:31:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:31:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:31:40,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851146810] [2022-04-06 21:31:40,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176834847] [2022-04-06 21:31:40,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176834847] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:40,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:40,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-06 21:31:40,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:40,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501132963] [2022-04-06 21:31:40,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501132963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:40,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:40,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:31:40,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924587529] [2022-04-06 21:31:40,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:40,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:31:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:31:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:31:40,199 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:40,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:40,283 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-04-06 21:31:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:31:40,285 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-04-06 21:31:40,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:40,286 INFO L225 Difference]: With dead ends: 87 [2022-04-06 21:31:40,286 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:31:40,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:31:40,286 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:40,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 120 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:31:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:31:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2022-04-06 21:31:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 57 states have internal predecessors, (60), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:31:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-04-06 21:31:40,300 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 48 [2022-04-06 21:31:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:40,300 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-04-06 21:31:40,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-04-06 21:31:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 21:31:40,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:40,301 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:40,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:40,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:31:40,521 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 3 times [2022-04-06 21:31:40,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:40,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1247625491] [2022-04-06 21:31:40,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1154259258, now seen corresponding path program 4 times [2022-04-06 21:31:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979474486] [2022-04-06 21:31:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:40,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:40,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966838010] [2022-04-06 21:31:40,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:31:40,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:40,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:31:40,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:31:40,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:31:40,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:31:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:31:40,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 21:31:41,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:41,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979474486] [2022-04-06 21:31:41,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966838010] [2022-04-06 21:31:41,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966838010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:41,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:41,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-04-06 21:31:41,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:41,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1247625491] [2022-04-06 21:31:41,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1247625491] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:41,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:41,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:31:41,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075764769] [2022-04-06 21:31:41,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:41,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:31:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:31:41,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:31:41,277 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:41,571 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-04-06 21:31:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:31:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-04-06 21:31:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:41,572 INFO L225 Difference]: With dead ends: 87 [2022-04-06 21:31:41,572 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:31:41,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:31:41,573 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:41,573 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 225 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:31:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:31:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2022-04-06 21:31:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:31:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-04-06 21:31:41,584 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 48 [2022-04-06 21:31:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:41,584 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-04-06 21:31:41,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-04-06 21:31:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:31:41,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:41,585 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:41,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:41,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 21:31:41,798 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -463038031, now seen corresponding path program 5 times [2022-04-06 21:31:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105454805] [2022-04-06 21:31:41,799 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:41,799 INFO L85 PathProgramCache]: Analyzing trace with hash -463038031, now seen corresponding path program 6 times [2022-04-06 21:31:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191730150] [2022-04-06 21:31:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:41,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:41,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405925107] [2022-04-06 21:31:41,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:31:41,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:41,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:41,806 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) [2022-04-06 21:31:41,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:31:41,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:31:41,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:31:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:42,020 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:31:42,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 21:31:42,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:42,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191730150] [2022-04-06 21:31:42,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:42,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405925107] [2022-04-06 21:31:42,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405925107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:42,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:42,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 21:31:42,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:42,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105454805] [2022-04-06 21:31:42,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105454805] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:42,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:42,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:31:42,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948523862] [2022-04-06 21:31:42,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:42,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:31:42,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:42,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:31:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:31:42,368 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:42,689 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-04-06 21:31:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:31:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:31:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:42,690 INFO L225 Difference]: With dead ends: 88 [2022-04-06 21:31:42,690 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 21:31:42,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:31:42,691 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:42,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 216 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:31:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 21:31:42,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2022-04-06 21:31:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 55 states have internal predecessors, (61), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 21:31:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-04-06 21:31:42,703 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 50 [2022-04-06 21:31:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:42,703 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-04-06 21:31:42,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-04-06 21:31:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:31:42,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:42,704 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:42,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:42,904 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 [2022-04-06 21:31:42,905 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 5 times [2022-04-06 21:31:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:42,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2043294135] [2022-04-06 21:31:42,905 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1311969331, now seen corresponding path program 6 times [2022-04-06 21:31:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:42,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561902737] [2022-04-06 21:31:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:42,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:42,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:42,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634396023] [2022-04-06 21:31:42,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:31:42,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:42,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:42,932 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) [2022-04-06 21:31:42,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:31:42,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:31:42,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:31:42,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:43,218 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:43,219 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:31:43,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 21:31:44,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:44,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561902737] [2022-04-06 21:31:44,097 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:44,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634396023] [2022-04-06 21:31:44,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634396023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:44,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:44,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-04-06 21:31:44,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:44,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2043294135] [2022-04-06 21:31:44,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2043294135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:44,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:44,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:31:44,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350438582] [2022-04-06 21:31:44,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:44,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:31:44,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:44,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:31:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:31:44,098 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 15 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:46,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:48,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:50,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:31:50,949 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2022-04-06 21:31:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:31:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:31:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:31:50,950 INFO L225 Difference]: With dead ends: 88 [2022-04-06 21:31:50,950 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 21:31:50,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:31:50,951 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 19 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:31:50,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 212 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 424 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-04-06 21:31:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 21:31:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-04-06 21:31:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.11864406779661) internal successors, (66), 61 states have internal predecessors, (66), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:31:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-04-06 21:31:50,965 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 50 [2022-04-06 21:31:50,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:31:50,965 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-04-06 21:31:50,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.5) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-04-06 21:31:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:31:50,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:31:50,966 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:31:50,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:31:51,167 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 [2022-04-06 21:31:51,167 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:31:51,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:31:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 7 times [2022-04-06 21:31:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:51,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [131027661] [2022-04-06 21:31:51,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:31:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1484106385, now seen corresponding path program 8 times [2022-04-06 21:31:51,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:31:51,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530163403] [2022-04-06 21:31:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:31:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:31:51,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:31:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215986852] [2022-04-06 21:31:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:31:51,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:31:51,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:31:51,175 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) [2022-04-06 21:31:51,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:31:51,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:31:51,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:31:51,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:31:51,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:31:51,441 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:51,442 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:51,445 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:31:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:31:52,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:31:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 21:31:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:31:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530163403] [2022-04-06 21:31:52,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:31:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215986852] [2022-04-06 21:31:52,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215986852] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:31:52,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:31:52,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-04-06 21:31:52,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:31:52,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [131027661] [2022-04-06 21:31:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [131027661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:31:52,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:31:52,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:31:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495023073] [2022-04-06 21:31:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:31:52,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:31:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:31:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:31:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:31:52,920 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:31:55,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:57,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:31:59,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:05,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:32:05,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:05,664 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-04-06 21:32:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:32:05,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:32:05,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:05,665 INFO L225 Difference]: With dead ends: 100 [2022-04-06 21:32:05,666 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 21:32:05,666 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:32:05,666 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:05,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 242 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 501 Invalid, 4 Unknown, 0 Unchecked, 9.5s Time] [2022-04-06 21:32:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 21:32:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2022-04-06 21:32:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.126984126984127) internal successors, (71), 65 states have internal predecessors, (71), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:32:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-04-06 21:32:05,682 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 50 [2022-04-06 21:32:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:05,682 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-04-06 21:32:05,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-04-06 21:32:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:32:05,683 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:05,683 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:05,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:32:05,883 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 [2022-04-06 21:32:05,883 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:05,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:05,883 INFO L85 PathProgramCache]: Analyzing trace with hash 290900977, now seen corresponding path program 9 times [2022-04-06 21:32:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310482849] [2022-04-06 21:32:05,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash 290900977, now seen corresponding path program 10 times [2022-04-06 21:32:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:05,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138760605] [2022-04-06 21:32:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:05,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:05,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186130436] [2022-04-06 21:32:05,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:32:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:05,907 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) [2022-04-06 21:32:05,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:32:05,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:32:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:32:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:32:06,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:32:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:32:06,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138760605] [2022-04-06 21:32:06,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:06,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186130436] [2022-04-06 21:32:06,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186130436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:06,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:06,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 21:32:06,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310482849] [2022-04-06 21:32:06,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310482849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:06,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:06,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:32:06,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172603602] [2022-04-06 21:32:06,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:06,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:32:06,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:32:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:32:06,145 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:06,240 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2022-04-06 21:32:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:32:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:32:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:06,241 INFO L225 Difference]: With dead ends: 121 [2022-04-06 21:32:06,241 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 21:32:06,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:32:06,242 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:06,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 91 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:32:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 21:32:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-04-06 21:32:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.131578947368421) internal successors, (86), 79 states have internal predecessors, (86), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 21:32:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-04-06 21:32:06,265 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 50 [2022-04-06 21:32:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:06,265 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-04-06 21:32:06,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-04-06 21:32:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:32:06,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:06,266 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:06,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:32:06,467 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 [2022-04-06 21:32:06,467 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 11 times [2022-04-06 21:32:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451966423] [2022-04-06 21:32:06,468 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1452517941, now seen corresponding path program 12 times [2022-04-06 21:32:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944477091] [2022-04-06 21:32:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:06,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:06,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554888969] [2022-04-06 21:32:06,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:32:06,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:06,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:06,474 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) [2022-04-06 21:32:06,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:32:06,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:32:06,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 21:32:06,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 21:32:06,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:32:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 21:32:07,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:07,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944477091] [2022-04-06 21:32:07,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:07,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554888969] [2022-04-06 21:32:07,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554888969] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:07,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 21 [2022-04-06 21:32:07,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:07,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451966423] [2022-04-06 21:32:07,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451966423] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:07,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:07,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:32:07,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65018623] [2022-04-06 21:32:07,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:07,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:32:07,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:32:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:32:07,191 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:07,464 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2022-04-06 21:32:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:32:07,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:32:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:07,466 INFO L225 Difference]: With dead ends: 117 [2022-04-06 21:32:07,466 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 21:32:07,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:32:07,466 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:07,467 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 187 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:32:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 21:32:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-04-06 21:32:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.123456790123457) internal successors, (91), 85 states have internal predecessors, (91), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:32:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2022-04-06 21:32:07,500 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 50 [2022-04-06 21:32:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:07,500 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2022-04-06 21:32:07,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2022-04-06 21:32:07,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:32:07,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:07,501 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:07,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:32:07,701 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 [2022-04-06 21:32:07,701 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 13 times [2022-04-06 21:32:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:07,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1635385747] [2022-04-06 21:32:07,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:07,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1343557775, now seen corresponding path program 14 times [2022-04-06 21:32:07,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:07,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128911807] [2022-04-06 21:32:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:07,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:07,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:07,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905350197] [2022-04-06 21:32:07,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:32:07,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:07,708 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) [2022-04-06 21:32:07,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:32:07,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:32:07,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:32:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:08,214 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:08,216 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:08,218 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:32:08,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:32:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 21:32:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128911807] [2022-04-06 21:32:09,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905350197] [2022-04-06 21:32:09,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905350197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:09,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:09,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-04-06 21:32:09,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:09,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1635385747] [2022-04-06 21:32:09,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1635385747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:09,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:09,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:32:09,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847597114] [2022-04-06 21:32:09,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:09,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:32:09,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:32:09,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:32:09,024 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:09,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:09,690 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2022-04-06 21:32:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:32:09,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:32:09,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:09,691 INFO L225 Difference]: With dead ends: 134 [2022-04-06 21:32:09,691 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 21:32:09,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:32:09,692 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:09,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 213 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:32:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 21:32:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-06 21:32:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 93 states have internal predecessors, (100), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:32:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2022-04-06 21:32:09,720 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 50 [2022-04-06 21:32:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:09,720 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2022-04-06 21:32:09,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 15 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2022-04-06 21:32:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 21:32:09,721 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:09,721 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:09,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:32:09,932 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 [2022-04-06 21:32:09,933 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 5 times [2022-04-06 21:32:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721680910] [2022-04-06 21:32:09,933 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 431449587, now seen corresponding path program 6 times [2022-04-06 21:32:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385894513] [2022-04-06 21:32:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:09,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:09,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845602009] [2022-04-06 21:32:09,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:32:09,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:09,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:09,947 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) [2022-04-06 21:32:09,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:32:09,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 21:32:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 21:32:09,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:32:10,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:32:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 21:32:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385894513] [2022-04-06 21:32:10,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845602009] [2022-04-06 21:32:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845602009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:10,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2022-04-06 21:32:10,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:10,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721680910] [2022-04-06 21:32:10,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721680910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:10,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:32:10,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399258895] [2022-04-06 21:32:10,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:10,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:32:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:32:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:32:10,661 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:10,994 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2022-04-06 21:32:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:32:10,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-04-06 21:32:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:10,995 INFO L225 Difference]: With dead ends: 142 [2022-04-06 21:32:10,995 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 21:32:10,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:32:10,996 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:10,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 233 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:32:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 21:32:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2022-04-06 21:32:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 99 states have internal predecessors, (106), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:32:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-04-06 21:32:11,022 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 50 [2022-04-06 21:32:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:11,023 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-04-06 21:32:11,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:32:11,023 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-04-06 21:32:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:32:11,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:11,023 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:11,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 21:32:11,231 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 [2022-04-06 21:32:11,232 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 850213676, now seen corresponding path program 3 times [2022-04-06 21:32:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638120178] [2022-04-06 21:32:11,233 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 850213676, now seen corresponding path program 4 times [2022-04-06 21:32:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993258364] [2022-04-06 21:32:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:11,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:11,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218815352] [2022-04-06 21:32:11,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:32:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:11,240 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) [2022-04-06 21:32:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:32:11,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:32:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:32:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:32:11,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:32:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:32:11,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:32:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993258364] [2022-04-06 21:32:11,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:32:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218815352] [2022-04-06 21:32:11,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218815352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:32:11,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:32:11,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-04-06 21:32:11,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:32:11,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638120178] [2022-04-06 21:32:11,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638120178] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:32:11,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:32:11,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:32:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436443875] [2022-04-06 21:32:11,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:32:11,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:32:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:32:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:32:11,674 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:32:11,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:32:11,801 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2022-04-06 21:32:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:32:11,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-04-06 21:32:11,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:32:11,802 INFO L225 Difference]: With dead ends: 140 [2022-04-06 21:32:11,802 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 21:32:11,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:32:11,803 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:32:11,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:32:11,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 21:32:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 21:32:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 96 states have (on average 1.1145833333333333) internal successors, (107), 99 states have internal predecessors, (107), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:32:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 145 transitions. [2022-04-06 21:32:11,830 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 145 transitions. Word has length 57 [2022-04-06 21:32:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:32:11,830 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 145 transitions. [2022-04-06 21:32:11,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:32:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 145 transitions. [2022-04-06 21:32:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:32:11,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:32:11,831 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:32:11,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:32:12,033 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 [2022-04-06 21:32:12,033 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:32:12,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:32:12,033 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 5 times [2022-04-06 21:32:12,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:32:12,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2035047432] [2022-04-06 21:32:12,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:32:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash 55892592, now seen corresponding path program 6 times [2022-04-06 21:32:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:32:12,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992278135] [2022-04-06 21:32:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:32:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:32:12,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:32:12,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500223428] [2022-04-06 21:32:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:32:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:32:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:32:12,046 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) [2022-04-06 21:32:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:32:12,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:32:12,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:32:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 21:32:12,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:32:13,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:13,517 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:13,518 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:32:59,455 WARN L232 SmtUtils]: Spent 24.72s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:33:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:33:23,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:33:30,629 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:33:37,855 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:33:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:33:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:33:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992278135] [2022-04-06 21:33:37,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:33:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500223428] [2022-04-06 21:33:37,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500223428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:33:37,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:33:37,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-04-06 21:33:37,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:33:37,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2035047432] [2022-04-06 21:33:37,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2035047432] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:33:37,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:33:37,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:33:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625658669] [2022-04-06 21:33:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:33:37,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:33:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:33:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:33:37,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=622, Unknown=10, NotChecked=0, Total=756 [2022-04-06 21:33:37,996 INFO L87 Difference]: Start difference. First operand 130 states and 145 transitions. Second operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:33:39,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:33:44,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:33:46,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:33:53,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:33:55,389 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:33:59,820 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse8 (* 2 c_main_~Y~0)) (.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (not (<= c_main_~x~0 c_main_~X~0)) (<= c_main_~X~0 100) (< .cse8 c_main_~X~0) (< c_main_~v~0 .cse8) (<= 0 c_main_~Y~0) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) .cse8) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-04-06 21:33:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:33:59,884 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-04-06 21:33:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:33:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-04-06 21:33:59,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:33:59,885 INFO L225 Difference]: With dead ends: 138 [2022-04-06 21:33:59,885 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 21:33:59,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=203, Invalid=979, Unknown=12, NotChecked=66, Total=1260 [2022-04-06 21:33:59,886 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:33:59,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 146 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 407 Invalid, 3 Unknown, 1 Unchecked, 10.4s Time] [2022-04-06 21:33:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 21:33:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2022-04-06 21:33:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 99 states have internal predecessors, (103), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:33:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-04-06 21:33:59,944 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 57 [2022-04-06 21:33:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:33:59,945 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-04-06 21:33:59,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:33:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-04-06 21:33:59,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:33:59,945 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:33:59,945 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:33:59,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:00,147 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 [2022-04-06 21:34:00,148 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 7 times [2022-04-06 21:34:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768034921] [2022-04-06 21:34:00,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1124973290, now seen corresponding path program 8 times [2022-04-06 21:34:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:00,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819620299] [2022-04-06 21:34:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:00,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:00,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760812436] [2022-04-06 21:34:00,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:34:00,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:00,155 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) [2022-04-06 21:34:00,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:34:00,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:34:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:34:00,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:00,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:01,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819620299] [2022-04-06 21:34:01,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760812436] [2022-04-06 21:34:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760812436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:01,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:01,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-04-06 21:34:01,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768034921] [2022-04-06 21:34:01,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768034921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:01,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:01,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:34:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383566771] [2022-04-06 21:34:01,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:01,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:34:01,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:34:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:34:01,214 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:01,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:01,506 INFO L93 Difference]: Finished difference Result 141 states and 156 transitions. [2022-04-06 21:34:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:34:01,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 57 [2022-04-06 21:34:01,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:01,508 INFO L225 Difference]: With dead ends: 141 [2022-04-06 21:34:01,509 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 21:34:01,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:34:01,510 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:01,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 225 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:34:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 21:34:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-06 21:34:01,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.092783505154639) internal successors, (106), 102 states have internal predecessors, (106), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:34:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2022-04-06 21:34:01,542 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 57 [2022-04-06 21:34:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:01,542 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2022-04-06 21:34:01,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2022-04-06 21:34:01,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 21:34:01,543 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:01,543 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:01,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:01,759 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 [2022-04-06 21:34:01,759 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 5 times [2022-04-06 21:34:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148894533] [2022-04-06 21:34:01,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash -680465044, now seen corresponding path program 6 times [2022-04-06 21:34:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:01,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215632712] [2022-04-06 21:34:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:01,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:01,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365037136] [2022-04-06 21:34:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:34:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:01,772 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) [2022-04-06 21:34:01,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:34:02,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:34:02,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:34:02,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:02,512 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:02,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:02,515 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:10,089 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0)) is different from false [2022-04-06 21:34:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 21:34:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 21:34:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215632712] [2022-04-06 21:34:29,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365037136] [2022-04-06 21:34:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365037136] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:29,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2022-04-06 21:34:29,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:29,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148894533] [2022-04-06 21:34:29,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148894533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:29,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:29,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:34:29,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916422124] [2022-04-06 21:34:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:29,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:34:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:34:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=313, Unknown=1, NotChecked=36, Total=420 [2022-04-06 21:34:29,804 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:34:32,074 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (not (<= c_main_~x~0 c_main_~X~0)) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~Y~0)) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-04-06 21:34:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:32,100 INFO L93 Difference]: Finished difference Result 139 states and 152 transitions. [2022-04-06 21:34:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:34:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-04-06 21:34:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:32,102 INFO L225 Difference]: With dead ends: 139 [2022-04-06 21:34:32,102 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 21:34:32,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=170, Invalid=648, Unknown=2, NotChecked=110, Total=930 [2022-04-06 21:34:32,102 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:32,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 180 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 163 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-04-06 21:34:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 21:34:32,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-04-06 21:34:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 93 states have (on average 1.086021505376344) internal successors, (101), 97 states have internal predecessors, (101), 19 states have call successors, (19), 14 states have call predecessors, (19), 13 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 21:34:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 138 transitions. [2022-04-06 21:34:32,129 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 138 transitions. Word has length 57 [2022-04-06 21:34:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:32,129 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 138 transitions. [2022-04-06 21:34:32,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-06 21:34:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 138 transitions. [2022-04-06 21:34:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:32,130 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:32,130 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:32,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:32,331 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 [2022-04-06 21:34:32,331 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1830651545, now seen corresponding path program 7 times [2022-04-06 21:34:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1457673725] [2022-04-06 21:34:32,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1830651545, now seen corresponding path program 8 times [2022-04-06 21:34:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651467757] [2022-04-06 21:34:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:32,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:32,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:32,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788123704] [2022-04-06 21:34:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:34:32,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:32,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:32,338 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) [2022-04-06 21:34:32,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:34:32,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:34:32,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:32,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:34:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 21:34:32,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-04-06 21:34:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651467757] [2022-04-06 21:34:32,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788123704] [2022-04-06 21:34:32,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788123704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:32,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:32,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 20 [2022-04-06 21:34:32,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:32,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1457673725] [2022-04-06 21:34:32,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1457673725] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:32,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:32,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:34:32,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851131181] [2022-04-06 21:34:32,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:32,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:34:32,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:34:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-04-06 21:34:32,960 INFO L87 Difference]: Start difference. First operand 126 states and 138 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:33,215 INFO L93 Difference]: Finished difference Result 139 states and 153 transitions. [2022-04-06 21:34:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:34:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:33,217 INFO L225 Difference]: With dead ends: 139 [2022-04-06 21:34:33,217 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 21:34:33,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:34:33,218 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:33,218 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 115 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:34:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 21:34:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2022-04-06 21:34:33,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 100 states have (on average 1.09) internal successors, (109), 104 states have internal predecessors, (109), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (19), 15 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:34:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2022-04-06 21:34:33,246 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 59 [2022-04-06 21:34:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:33,247 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2022-04-06 21:34:33,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2022-04-06 21:34:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:33,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:33,247 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:33,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:33,448 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 [2022-04-06 21:34:33,449 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:33,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -689308389, now seen corresponding path program 15 times [2022-04-06 21:34:33,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [822045103] [2022-04-06 21:34:33,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash -689308389, now seen corresponding path program 16 times [2022-04-06 21:34:33,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684806331] [2022-04-06 21:34:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:33,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160182398] [2022-04-06 21:34:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:34:33,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:33,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:33,455 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) [2022-04-06 21:34:33,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:34:33,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:34:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:34:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:33,928 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:34:34,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 21:34:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684806331] [2022-04-06 21:34:34,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160182398] [2022-04-06 21:34:34,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160182398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:34,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:34,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 26 [2022-04-06 21:34:34,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:34,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [822045103] [2022-04-06 21:34:34,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [822045103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:34,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:34,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:34:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885140093] [2022-04-06 21:34:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:34,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:34:34,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:34:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:34:34,474 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:35,034 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2022-04-06 21:34:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:34:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:35,035 INFO L225 Difference]: With dead ends: 150 [2022-04-06 21:34:35,035 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 21:34:35,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:34:35,036 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:35,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:34:35,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 21:34:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2022-04-06 21:34:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 113 states have internal predecessors, (117), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:34:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2022-04-06 21:34:35,067 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 59 [2022-04-06 21:34:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:35,067 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2022-04-06 21:34:35,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2022-04-06 21:34:35,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:35,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:35,068 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:35,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:35,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:35,283 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 17 times [2022-04-06 21:34:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286474594] [2022-04-06 21:34:35,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 809583191, now seen corresponding path program 18 times [2022-04-06 21:34:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232140450] [2022-04-06 21:34:35,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:35,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:35,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360973917] [2022-04-06 21:34:35,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:34:35,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:35,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:35,292 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:35,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:34:35,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:34:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 21:34:35,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:34:35,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 21:34:35,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232140450] [2022-04-06 21:34:35,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360973917] [2022-04-06 21:34:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360973917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:35,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:35,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 24 [2022-04-06 21:34:35,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286474594] [2022-04-06 21:34:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286474594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:35,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:35,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:34:35,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021250032] [2022-04-06 21:34:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:35,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:34:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:34:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:34:35,968 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:36,410 INFO L93 Difference]: Finished difference Result 159 states and 172 transitions. [2022-04-06 21:34:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:34:36,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:36,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:36,411 INFO L225 Difference]: With dead ends: 159 [2022-04-06 21:34:36,411 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 21:34:36,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:34:36,412 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:36,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:34:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 21:34:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 148. [2022-04-06 21:34:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 114 states have internal predecessors, (119), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:34:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2022-04-06 21:34:36,444 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 59 [2022-04-06 21:34:36,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:36,444 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2022-04-06 21:34:36,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:36,444 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2022-04-06 21:34:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:36,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:36,444 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:36,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:36,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:34:36,659 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 19 times [2022-04-06 21:34:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402145739] [2022-04-06 21:34:36,660 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1971200155, now seen corresponding path program 20 times [2022-04-06 21:34:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436611559] [2022-04-06 21:34:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:36,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:36,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:36,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418498687] [2022-04-06 21:34:36,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:34:36,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:36,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:36,666 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:36,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 21:34:36,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:34:36,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:36,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 21:34:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:37,508 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:37,509 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:40,064 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:40,066 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-06 21:34:44,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 21:34:45,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436611559] [2022-04-06 21:34:45,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:45,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418498687] [2022-04-06 21:34:45,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418498687] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:45,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:45,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 28 [2022-04-06 21:34:45,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:45,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402145739] [2022-04-06 21:34:45,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402145739] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:45,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:45,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:34:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207914181] [2022-04-06 21:34:45,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:45,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:34:45,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:45,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:34:45,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:34:45,383 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:47,721 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-04-06 21:34:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:34:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:47,722 INFO L225 Difference]: With dead ends: 165 [2022-04-06 21:34:47,722 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 21:34:47,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:34:47,723 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:47,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 102 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:34:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 21:34:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2022-04-06 21:34:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 118 states have internal predecessors, (125), 21 states have call successors, (21), 18 states have call predecessors, (21), 17 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:34:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 166 transitions. [2022-04-06 21:34:47,767 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 166 transitions. Word has length 59 [2022-04-06 21:34:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:47,767 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 166 transitions. [2022-04-06 21:34:47,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 166 transitions. [2022-04-06 21:34:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:47,768 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:47,768 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:47,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:47,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:34:47,980 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 21 times [2022-04-06 21:34:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:47,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612121511] [2022-04-06 21:34:47,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:47,981 INFO L85 PathProgramCache]: Analyzing trace with hash -548759779, now seen corresponding path program 22 times [2022-04-06 21:34:47,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:47,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529438601] [2022-04-06 21:34:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:47,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:47,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:47,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066821945] [2022-04-06 21:34:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:34:47,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:47,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:47,986 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:47,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 21:34:48,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:34:48,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:48,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 21:34:48,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:48,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:48,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529438601] [2022-04-06 21:34:48,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066821945] [2022-04-06 21:34:48,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066821945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:48,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:48,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 21:34:48,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:48,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612121511] [2022-04-06 21:34:48,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612121511] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:48,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:48,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:34:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351240949] [2022-04-06 21:34:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:48,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:34:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:34:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:34:48,747 INFO L87 Difference]: Start difference. First operand 154 states and 166 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:49,032 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2022-04-06 21:34:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:34:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:49,033 INFO L225 Difference]: With dead ends: 165 [2022-04-06 21:34:49,034 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 21:34:49,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:34:49,034 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:49,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 247 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:34:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 21:34:49,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2022-04-06 21:34:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 108 states have (on average 1.0833333333333333) internal successors, (117), 111 states have internal predecessors, (117), 20 states have call successors, (20), 17 states have call predecessors, (20), 16 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:34:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2022-04-06 21:34:49,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 59 [2022-04-06 21:34:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:49,068 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2022-04-06 21:34:49,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2022-04-06 21:34:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:49,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:49,068 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:49,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:49,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:34:49,300 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:49,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 23 times [2022-04-06 21:34:49,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:49,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [258197225] [2022-04-06 21:34:49,301 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1434400107, now seen corresponding path program 24 times [2022-04-06 21:34:49,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222770537] [2022-04-06 21:34:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:49,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:49,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:49,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163727390] [2022-04-06 21:34:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:34:49,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:49,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:49,308 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:49,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 21:34:49,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:34:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 21:34:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:49,728 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:49,729 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:51,028 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:34:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:34:51,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 21:34:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222770537] [2022-04-06 21:34:52,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163727390] [2022-04-06 21:34:52,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163727390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:52,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:52,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 27 [2022-04-06 21:34:52,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [258197225] [2022-04-06 21:34:52,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [258197225] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:52,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:52,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:34:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406850150] [2022-04-06 21:34:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:52,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:34:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:34:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:34:52,615 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:54,687 INFO L93 Difference]: Finished difference Result 170 states and 186 transitions. [2022-04-06 21:34:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:34:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:54,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:54,688 INFO L225 Difference]: With dead ends: 170 [2022-04-06 21:34:54,688 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 21:34:54,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:34:54,689 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:54,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 232 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:34:54,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 21:34:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 150. [2022-04-06 21:34:54,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 115 states have internal predecessors, (122), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:34:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 163 transitions. [2022-04-06 21:34:54,726 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 163 transitions. Word has length 59 [2022-04-06 21:34:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:54,726 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 163 transitions. [2022-04-06 21:34:54,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 163 transitions. [2022-04-06 21:34:54,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:54,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:54,727 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:54,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:54,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:34:54,936 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:54,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 340607255, now seen corresponding path program 25 times [2022-04-06 21:34:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526007277] [2022-04-06 21:34:54,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:54,936 INFO L85 PathProgramCache]: Analyzing trace with hash 340607255, now seen corresponding path program 26 times [2022-04-06 21:34:54,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:54,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83450932] [2022-04-06 21:34:54,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:54,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:54,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470396259] [2022-04-06 21:34:54,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:34:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:54,942 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:54,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 21:34:54,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:34:54,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 21:34:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:55,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:55,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83450932] [2022-04-06 21:34:55,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470396259] [2022-04-06 21:34:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470396259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:55,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:55,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-04-06 21:34:55,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526007277] [2022-04-06 21:34:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526007277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:55,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:55,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:34:55,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288335982] [2022-04-06 21:34:55,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:55,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:34:55,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:34:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:34:55,880 INFO L87 Difference]: Start difference. First operand 150 states and 163 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:56,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:56,194 INFO L93 Difference]: Finished difference Result 161 states and 175 transitions. [2022-04-06 21:34:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:34:56,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:56,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:56,196 INFO L225 Difference]: With dead ends: 161 [2022-04-06 21:34:56,196 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 21:34:56,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:34:56,197 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:56,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 268 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:34:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 21:34:56,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-04-06 21:34:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 121 states have internal predecessors, (127), 22 states have call successors, (22), 18 states have call predecessors, (22), 17 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 21:34:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 170 transitions. [2022-04-06 21:34:56,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 170 transitions. Word has length 59 [2022-04-06 21:34:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:56,234 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 170 transitions. [2022-04-06 21:34:56,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:56,234 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 170 transitions. [2022-04-06 21:34:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:56,235 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:56,235 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:56,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 21:34:56,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:34:56,439 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1502224219, now seen corresponding path program 27 times [2022-04-06 21:34:56,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1785412567] [2022-04-06 21:34:56,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:56,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1502224219, now seen corresponding path program 28 times [2022-04-06 21:34:56,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:56,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667763547] [2022-04-06 21:34:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:56,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:56,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222622035] [2022-04-06 21:34:56,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:34:56,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:56,449 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:56,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 21:34:56,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:34:56,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 21:34:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:57,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667763547] [2022-04-06 21:34:57,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222622035] [2022-04-06 21:34:57,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222622035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:57,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-04-06 21:34:57,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:57,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1785412567] [2022-04-06 21:34:57,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1785412567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:57,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 21:34:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610236261] [2022-04-06 21:34:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:57,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 21:34:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 21:34:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:34:57,470 INFO L87 Difference]: Start difference. First operand 157 states and 170 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:57,761 INFO L93 Difference]: Finished difference Result 182 states and 199 transitions. [2022-04-06 21:34:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:34:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:57,762 INFO L225 Difference]: With dead ends: 182 [2022-04-06 21:34:57,762 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 21:34:57,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:34:57,763 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:57,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 251 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:34:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 21:34:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2022-04-06 21:34:57,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 131 states have internal predecessors, (136), 24 states have call successors, (24), 19 states have call predecessors, (24), 18 states have return successors, (23), 18 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:34:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-04-06 21:34:57,805 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 59 [2022-04-06 21:34:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:57,805 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-04-06 21:34:57,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-04-06 21:34:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:57,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:57,806 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:57,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:58,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:58,010 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1293851497, now seen corresponding path program 29 times [2022-04-06 21:34:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:58,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575475832] [2022-04-06 21:34:58,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1293851497, now seen corresponding path program 30 times [2022-04-06 21:34:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:58,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948887592] [2022-04-06 21:34:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:58,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:58,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696908168] [2022-04-06 21:34:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:34:58,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:58,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:58,018 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:58,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 21:34:58,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:34:58,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 21:34:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 21:34:58,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:34:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 21:34:58,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:34:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948887592] [2022-04-06 21:34:58,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:34:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696908168] [2022-04-06 21:34:58,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696908168] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:34:58,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:34:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-04-06 21:34:58,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:34:58,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575475832] [2022-04-06 21:34:58,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575475832] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:34:58,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:34:58,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:34:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276681574] [2022-04-06 21:34:58,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:34:58,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:34:58,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:34:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:34:58,924 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:34:59,318 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2022-04-06 21:34:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:34:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:34:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:34:59,319 INFO L225 Difference]: With dead ends: 195 [2022-04-06 21:34:59,319 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 21:34:59,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:34:59,320 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:34:59,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 263 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:34:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 21:34:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2022-04-06 21:34:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.083969465648855) internal successors, (142), 135 states have internal predecessors, (142), 24 states have call successors, (24), 20 states have call predecessors, (24), 19 states have return successors, (23), 19 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:34:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 189 transitions. [2022-04-06 21:34:59,363 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 189 transitions. Word has length 59 [2022-04-06 21:34:59,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:34:59,363 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 189 transitions. [2022-04-06 21:34:59,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:34:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 189 transitions. [2022-04-06 21:34:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:34:59,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:34:59,364 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:34:59,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 21:34:59,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 21:34:59,571 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:34:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:34:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 481155865, now seen corresponding path program 7 times [2022-04-06 21:34:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:34:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076038694] [2022-04-06 21:34:59,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:34:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 481155865, now seen corresponding path program 8 times [2022-04-06 21:34:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:34:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106614587] [2022-04-06 21:34:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:34:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:34:59,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:34:59,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337086002] [2022-04-06 21:34:59,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:34:59,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:34:59,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:34:59,578 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:34:59,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 21:34:59,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:34:59,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:34:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 21:34:59,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:34:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:34:59,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:35:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106614587] [2022-04-06 21:35:00,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337086002] [2022-04-06 21:35:00,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337086002] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:00,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:00,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2022-04-06 21:35:00,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076038694] [2022-04-06 21:35:00,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076038694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:00,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:00,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 21:35:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41485290] [2022-04-06 21:35:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:00,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 21:35:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 21:35:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-04-06 21:35:00,460 INFO L87 Difference]: Start difference. First operand 175 states and 189 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:35:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:00,806 INFO L93 Difference]: Finished difference Result 186 states and 201 transitions. [2022-04-06 21:35:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:35:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 59 [2022-04-06 21:35:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:00,807 INFO L225 Difference]: With dead ends: 186 [2022-04-06 21:35:00,807 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 21:35:00,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:35:00,808 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:00,808 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 285 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:35:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 21:35:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2022-04-06 21:35:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 131 states have (on average 1.083969465648855) internal successors, (142), 135 states have internal predecessors, (142), 24 states have call successors, (24), 20 states have call predecessors, (24), 19 states have return successors, (23), 19 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:35:00,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 189 transitions. [2022-04-06 21:35:00,852 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 189 transitions. Word has length 59 [2022-04-06 21:35:00,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:00,852 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 189 transitions. [2022-04-06 21:35:00,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-06 21:35:00,853 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 189 transitions. [2022-04-06 21:35:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:35:00,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:00,853 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:00,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:01,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:01,060 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1744740017, now seen corresponding path program 9 times [2022-04-06 21:35:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:01,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [280039219] [2022-04-06 21:35:01,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:35:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1744740017, now seen corresponding path program 10 times [2022-04-06 21:35:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:01,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810144812] [2022-04-06 21:35:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:01,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:01,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899686140] [2022-04-06 21:35:01,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:35:01,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:01,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:01,068 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:01,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 21:35:01,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:35:01,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:01,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 21:35:01,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-06 21:35:01,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 21:35:01,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810144812] [2022-04-06 21:35:01,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899686140] [2022-04-06 21:35:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899686140] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:01,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:01,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 26 [2022-04-06 21:35:01,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:01,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [280039219] [2022-04-06 21:35:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [280039219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:01,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:01,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:35:01,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945780084] [2022-04-06 21:35:01,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:01,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:35:01,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:35:01,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:35:01,832 INFO L87 Difference]: Start difference. First operand 175 states and 189 transitions. Second operand has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:02,215 INFO L93 Difference]: Finished difference Result 200 states and 218 transitions. [2022-04-06 21:35:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:35:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 68 [2022-04-06 21:35:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:02,216 INFO L225 Difference]: With dead ends: 200 [2022-04-06 21:35:02,216 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 21:35:02,217 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:35:02,217 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:02,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 242 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:35:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 21:35:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2022-04-06 21:35:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 147 states have (on average 1.08843537414966) internal successors, (160), 152 states have internal predecessors, (160), 27 states have call successors, (27), 22 states have call predecessors, (27), 21 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:35:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 213 transitions. [2022-04-06 21:35:02,275 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 213 transitions. Word has length 68 [2022-04-06 21:35:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:02,276 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 213 transitions. [2022-04-06 21:35:02,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.235294117647059) internal successors, (38), 20 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 213 transitions. [2022-04-06 21:35:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:35:02,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:02,276 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:02,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:02,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:02,490 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -775219917, now seen corresponding path program 31 times [2022-04-06 21:35:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1473795638] [2022-04-06 21:35:02,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:35:02,491 INFO L85 PathProgramCache]: Analyzing trace with hash -775219917, now seen corresponding path program 32 times [2022-04-06 21:35:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:02,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356554091] [2022-04-06 21:35:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:02,497 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907424606] [2022-04-06 21:35:02,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:35:02,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:02,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:02,499 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:02,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 21:35:02,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:35:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:35:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:03,355 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-06 21:35:03,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:35:03,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356554091] [2022-04-06 21:35:03,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907424606] [2022-04-06 21:35:03,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907424606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:03,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 28 [2022-04-06 21:35:03,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1473795638] [2022-04-06 21:35:03,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1473795638] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:03,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:35:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699458671] [2022-04-06 21:35:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:03,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:35:03,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:35:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:35:03,762 INFO L87 Difference]: Start difference. First operand 196 states and 213 transitions. Second operand has 23 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:05,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:07,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:10,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:10,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:10,481 INFO L93 Difference]: Finished difference Result 211 states and 227 transitions. [2022-04-06 21:35:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:35:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 68 [2022-04-06 21:35:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:10,483 INFO L225 Difference]: With dead ends: 211 [2022-04-06 21:35:10,483 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 21:35:10,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:35:10,483 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:10,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 148 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 732 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-04-06 21:35:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 21:35:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 184. [2022-04-06 21:35:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 142 states have internal predecessors, (150), 25 states have call successors, (25), 21 states have call predecessors, (25), 20 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:35:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2022-04-06 21:35:10,532 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 68 [2022-04-06 21:35:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:10,532 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2022-04-06 21:35:10,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:10,532 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2022-04-06 21:35:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:35:10,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:10,533 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:10,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 21:35:10,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 21:35:10,749 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 723671663, now seen corresponding path program 33 times [2022-04-06 21:35:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617257507] [2022-04-06 21:35:10,750 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:35:10,750 INFO L85 PathProgramCache]: Analyzing trace with hash 723671663, now seen corresponding path program 34 times [2022-04-06 21:35:10,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:10,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195186260] [2022-04-06 21:35:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:10,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:10,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720719415] [2022-04-06 21:35:10,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:35:10,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:10,755 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:10,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 21:35:10,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:35:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 21:35:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:11,389 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 18 proven. 64 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:35:11,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:35:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195186260] [2022-04-06 21:35:12,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720719415] [2022-04-06 21:35:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720719415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:12,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:12,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 25 [2022-04-06 21:35:12,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:12,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617257507] [2022-04-06 21:35:12,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617257507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:12,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:12,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:35:12,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109927004] [2022-04-06 21:35:12,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:12,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:35:12,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:35:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:35:12,190 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:14,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:16,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:35:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:17,552 INFO L93 Difference]: Finished difference Result 204 states and 220 transitions. [2022-04-06 21:35:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:35:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 68 [2022-04-06 21:35:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:17,554 INFO L225 Difference]: With dead ends: 204 [2022-04-06 21:35:17,554 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 21:35:17,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-04-06 21:35:17,555 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:17,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 277 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 753 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 21:35:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 21:35:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 184. [2022-04-06 21:35:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 142 states have internal predecessors, (150), 25 states have call successors, (25), 21 states have call predecessors, (25), 20 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:35:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2022-04-06 21:35:17,610 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 68 [2022-04-06 21:35:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:17,611 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2022-04-06 21:35:17,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-04-06 21:35:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2022-04-06 21:35:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 21:35:17,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:35:17,611 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:35:17,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:17,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 21:35:17,812 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:35:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:35:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1885288627, now seen corresponding path program 35 times [2022-04-06 21:35:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:17,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756686204] [2022-04-06 21:35:17,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:35:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1885288627, now seen corresponding path program 36 times [2022-04-06 21:35:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:35:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091214120] [2022-04-06 21:35:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:35:17,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:35:17,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:35:17,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498569190] [2022-04-06 21:35:17,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:35:17,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:35:17,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:35:17,818 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:35:17,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 21:35:17,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:35:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:35:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:35:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:35:17,960 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:17,962 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:17,965 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:35:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:35:21,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:35:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 46 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 21:35:21,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:35:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091214120] [2022-04-06 21:35:21,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:35:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498569190] [2022-04-06 21:35:21,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498569190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:35:21,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:35:21,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-04-06 21:35:21,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:35:21,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756686204] [2022-04-06 21:35:21,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756686204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:35:21,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:35:21,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:35:21,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858646122] [2022-04-06 21:35:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:35:21,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:35:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:35:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:35:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2022-04-06 21:35:21,387 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:35:50,630 WARN L232 SmtUtils]: Spent 29.17s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:35:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:35:50,735 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2022-04-06 21:35:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:35:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 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 68 [2022-04-06 21:35:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:35:50,736 INFO L225 Difference]: With dead ends: 184 [2022-04-06 21:35:50,736 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:35:50,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=43, Invalid=166, Unknown=1, NotChecked=0, Total=210 [2022-04-06 21:35:50,737 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:35:50,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 121 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-04-06 21:35:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:35:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:35:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:35:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:35:50,738 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-04-06 21:35:50,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:35:50,738 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:35:50,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:35:50,738 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:35:50,738 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:35:50,740 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:35:50,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 21:35:50,945 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 21:35:50,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:44:59,272 WARN L232 SmtUtils]: Spent 9.13m on a formula simplification. DAG size of input: 451 DAG size of output: 409 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 21:45:09,393 WARN L232 SmtUtils]: Spent 9.93s on a formula simplification. DAG size of input: 450 DAG size of output: 406 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 21:45:15,639 WARN L232 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 192 DAG size of output: 90 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:45:20,973 WARN L232 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 266 DAG size of output: 24 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)