/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:34:10,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:34:10,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:34:10,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:34:10,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:34:10,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:34:10,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:34:10,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:34:10,479 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:34:10,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:34:10,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:34:10,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:34:10,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:34:10,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:34:10,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:34:10,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:34:10,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:34:10,482 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:34:10,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:34:10,483 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:34:10,483 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:34:10,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:34:10,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:34:10,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:34:10,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:34:10,745 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:34:10,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-06 14:34:10,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94365414a/c57b756e4cb6467589bede7c7244f2bd/FLAGe3b5c109b [2022-04-06 14:34:11,132 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:34:11,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-06 14:34:11,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94365414a/c57b756e4cb6467589bede7c7244f2bd/FLAGe3b5c109b [2022-04-06 14:34:11,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94365414a/c57b756e4cb6467589bede7c7244f2bd [2022-04-06 14:34:11,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:34:11,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:34:11,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:34:11,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:34:11,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:34:11,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f8f552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11, skipping insertion in model container [2022-04-06 14:34:11,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:34:11,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:34:11,750 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-06 14:34:11,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:34:11,774 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:34:11,782 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-04-06 14:34:11,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:34:11,794 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:34:11,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11 WrapperNode [2022-04-06 14:34:11,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:34:11,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:34:11,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:34:11,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:34:11,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:34:11,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:34:11,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:34:11,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:34:11,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (1/1) ... [2022-04-06 14:34:11,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:34:11,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:11,856 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 14:34:11,870 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 14:34:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:34:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:34:11,896 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:34:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 14:34:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 14:34:11,897 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:34:11,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:34:11,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:34:11,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:34:11,966 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:34:11,967 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:34:12,097 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:34:12,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:34:12,101 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 14:34:12,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:34:12 BoogieIcfgContainer [2022-04-06 14:34:12,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:34:12,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:34:12,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:34:12,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:34:12,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:34:11" (1/3) ... [2022-04-06 14:34:12,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2752f585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:34:12, skipping insertion in model container [2022-04-06 14:34:12,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:34:11" (2/3) ... [2022-04-06 14:34:12,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2752f585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:34:12, skipping insertion in model container [2022-04-06 14:34:12,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:34:12" (3/3) ... [2022-04-06 14:34:12,124 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-04-06 14:34:12,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:34:12,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:34:12,202 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:34:12,208 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 14:34:12,208 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:34:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:34:12,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 14:34:12,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:12,230 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:12,231 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:12,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-04-06 14:34:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:12,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1914496629] [2022-04-06 14:34:12,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:34:12,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 2 times [2022-04-06 14:34:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21930324] [2022-04-06 14:34:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:12,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:34:12,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21930324] [2022-04-06 14:34:12,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21930324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:12,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:12,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:34:12,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:12,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1914496629] [2022-04-06 14:34:12,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1914496629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:12,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 14:34:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721324856] [2022-04-06 14:34:12,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:12,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 14:34:12,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:12,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 14:34:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 14:34:12,511 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:34:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:12,630 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-04-06 14:34:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 14:34:12,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 14:34:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:12,640 INFO L225 Difference]: With dead ends: 62 [2022-04-06 14:34:12,640 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 14:34:12,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:34:12,647 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:12,648 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:34:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 14:34:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-06 14:34:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:34:12,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 14:34:12,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-04-06 14:34:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:12,684 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 14:34:12,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:34:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 14:34:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 14:34:12,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:12,686 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:12,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:34:12,687 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:12,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-04-06 14:34:12,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:12,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [221905798] [2022-04-06 14:34:12,705 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:12,705 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:12,705 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 2 times [2022-04-06 14:34:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163322129] [2022-04-06 14:34:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:34:12,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163322129] [2022-04-06 14:34:12,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163322129] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:12,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111252568] [2022-04-06 14:34:12,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:12,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:12,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:12,796 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 14:34:12,806 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 14:34:12,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:12,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 14:34:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:12,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:13,134 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:13,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:34:13,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:13,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 14:34:13,537 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:34:13,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 14:34:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:34:13,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 4 [2022-04-06 14:34:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:34:13,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:34:13,637 INFO L356 Elim1Store]: treesize reduction 28, result has 50.0 percent of original size [2022-04-06 14:34:13,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 47 [2022-04-06 14:34:13,820 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-04-06 14:34:13,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 85 [2022-04-06 14:34:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:34:14,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111252568] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:34:14,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:34:14,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-04-06 14:34:14,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:14,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [221905798] [2022-04-06 14:34:14,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [221905798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:14,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:14,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:34:14,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626968087] [2022-04-06 14:34:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:14,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:34:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:34:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:34:14,095 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:34:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:14,208 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-04-06 14:34:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 14:34:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-04-06 14:34:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:14,210 INFO L225 Difference]: With dead ends: 52 [2022-04-06 14:34:14,210 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 14:34:14,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:34:14,212 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:14,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:34:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 14:34:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-04-06 14:34:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:34:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-06 14:34:14,220 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-04-06 14:34:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:14,220 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-06 14:34:14,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:34:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-06 14:34:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 14:34:14,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:14,222 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:14,248 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 14:34:14,422 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 14:34:14,423 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:14,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 3 times [2022-04-06 14:34:14,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:14,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [913894930] [2022-04-06 14:34:14,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:14,426 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:14,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 4 times [2022-04-06 14:34:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:14,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298055641] [2022-04-06 14:34:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:14,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:14,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 14:34:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298055641] [2022-04-06 14:34:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298055641] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101512037] [2022-04-06 14:34:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:14,562 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 14:34:14,563 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 14:34:14,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:14,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 14:34:14,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:14,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:14,949 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:14,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:15,321 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:15,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 14:34:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101512037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:19,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:19,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-04-06 14:34:19,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [913894930] [2022-04-06 14:34:19,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [913894930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:19,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:19,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:34:19,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559371658] [2022-04-06 14:34:19,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:19,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:34:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:34:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-04-06 14:34:19,322 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:34:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:19,458 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-04-06 14:34:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:34:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-04-06 14:34:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:19,460 INFO L225 Difference]: With dead ends: 60 [2022-04-06 14:34:19,460 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 14:34:19,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2022-04-06 14:34:19,461 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:19,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:34:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 14:34:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2022-04-06 14:34:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 14:34:19,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-04-06 14:34:19,469 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 29 [2022-04-06 14:34:19,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:19,470 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-04-06 14:34:19,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 14:34:19,470 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-04-06 14:34:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:34:19,471 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:19,471 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:19,496 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 14:34:19,679 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 14:34:19,680 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 912079898, now seen corresponding path program 5 times [2022-04-06 14:34:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:19,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531755969] [2022-04-06 14:34:19,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:19,685 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:19,685 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:19,685 INFO L85 PathProgramCache]: Analyzing trace with hash 912079898, now seen corresponding path program 6 times [2022-04-06 14:34:19,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:19,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162005019] [2022-04-06 14:34:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:19,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:19,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:19,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:19,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:34:19,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162005019] [2022-04-06 14:34:19,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162005019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179388773] [2022-04-06 14:34:19,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:34:19,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:19,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:19,804 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 14:34:19,805 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 14:34:19,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:34:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 14:34:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:20,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:20,262 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:20,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:20,580 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:20,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:20,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:34:20,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:34:20,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2022-04-06 14:34:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 14:34:21,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179388773] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:24,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16] total 21 [2022-04-06 14:34:24,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531755969] [2022-04-06 14:34:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531755969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:24,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:34:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327144012] [2022-04-06 14:34:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:24,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:34:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:34:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2022-04-06 14:34:24,518 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:34:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:24,733 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-04-06 14:34:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 14:34:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-04-06 14:34:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:24,735 INFO L225 Difference]: With dead ends: 68 [2022-04-06 14:34:24,735 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 14:34:24,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=120, Invalid=808, Unknown=2, NotChecked=0, Total=930 [2022-04-06 14:34:24,736 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:24,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 42 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:34:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 14:34:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-04-06 14:34:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 14:34:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 14:34:24,745 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 37 [2022-04-06 14:34:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:24,745 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 14:34:24,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 14:34:24,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 14:34:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 14:34:24,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:24,746 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:24,775 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 14:34:24,973 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 14:34:24,973 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:24,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash 42254965, now seen corresponding path program 7 times [2022-04-06 14:34:24,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:24,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [560053743] [2022-04-06 14:34:24,976 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:24,976 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:24,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 42254965, now seen corresponding path program 8 times [2022-04-06 14:34:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239197232] [2022-04-06 14:34:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:24,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:34:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 14:34:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239197232] [2022-04-06 14:34:25,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239197232] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:25,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909390926] [2022-04-06 14:34:25,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:25,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:25,155 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 14:34:25,165 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 14:34:25,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 14:34:25,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:25,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:25,545 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:25,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:25,828 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:25,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:26,114 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:26,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:26,302 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:26,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 14:34:26,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:32,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909390926] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:32,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:32,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 21 [2022-04-06 14:34:32,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:32,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [560053743] [2022-04-06 14:34:32,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [560053743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:32,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:32,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:34:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3605113] [2022-04-06 14:34:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:32,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:34:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:34:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=650, Unknown=3, NotChecked=0, Total=756 [2022-04-06 14:34:32,498 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 14:34:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:32,764 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2022-04-06 14:34:32,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:34:32,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-04-06 14:34:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:32,766 INFO L225 Difference]: With dead ends: 76 [2022-04-06 14:34:32,766 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 14:34:32,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=133, Invalid=920, Unknown=3, NotChecked=0, Total=1056 [2022-04-06 14:34:32,767 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:32,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 50 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:34:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 14:34:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 42. [2022-04-06 14:34:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 14:34:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-06 14:34:32,775 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 45 [2022-04-06 14:34:32,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:32,776 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-06 14:34:32,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 14:34:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-06 14:34:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 14:34:32,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:32,777 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:32,793 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 14:34:32,979 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 14:34:32,979 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1041874384, now seen corresponding path program 9 times [2022-04-06 14:34:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:32,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1498128254] [2022-04-06 14:34:32,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:32,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:32,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1041874384, now seen corresponding path program 10 times [2022-04-06 14:34:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:32,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091853757] [2022-04-06 14:34:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:34:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:34:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 14:34:33,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091853757] [2022-04-06 14:34:33,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091853757] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:33,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473334495] [2022-04-06 14:34:33,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:33,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:33,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:33,104 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 14:34:33,127 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 14:34:33,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:33,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:33,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 14:34:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:33,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:33,450 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:33,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:33,700 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:33,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:33,971 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:33,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:34,213 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:34,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:34,401 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:34,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 14:34:34,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:38,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473334495] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:38,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:38,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 22 [2022-04-06 14:34:38,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:38,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1498128254] [2022-04-06 14:34:38,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1498128254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:38,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:38,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:34:38,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391523666] [2022-04-06 14:34:38,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:38,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:34:38,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:38,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:34:38,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=611, Unknown=2, NotChecked=0, Total=702 [2022-04-06 14:34:38,108 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 14:34:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:38,425 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2022-04-06 14:34:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:34:38,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-04-06 14:34:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:38,426 INFO L225 Difference]: With dead ends: 84 [2022-04-06 14:34:38,426 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 14:34:38,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=124, Invalid=930, Unknown=2, NotChecked=0, Total=1056 [2022-04-06 14:34:38,427 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:38,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 63 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:34:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 14:34:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-04-06 14:34:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 14:34:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-04-06 14:34:38,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 53 [2022-04-06 14:34:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:38,437 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-04-06 14:34:38,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 14:34:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-04-06 14:34:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 14:34:38,438 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:38,438 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:38,457 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 14:34:38,651 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 14:34:38,652 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1926704683, now seen corresponding path program 11 times [2022-04-06 14:34:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:38,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820287162] [2022-04-06 14:34:38,654 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:38,654 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:38,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1926704683, now seen corresponding path program 12 times [2022-04-06 14:34:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:38,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451056639] [2022-04-06 14:34:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:34:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:34:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:34:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 14:34:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451056639] [2022-04-06 14:34:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451056639] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799819798] [2022-04-06 14:34:38,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:34:38,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:38,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:38,804 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 14:34:38,871 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 14:34:39,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 14:34:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:39,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 14:34:39,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:39,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 14:34:39,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 14:34:39,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:34:39,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-04-06 14:34:39,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:34:39,505 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:34:39,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:34:39,545 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-04-06 14:34:39,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-04-06 14:34:39,718 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-04-06 14:34:39,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-04-06 14:34:39,950 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:39,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:40,203 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-04-06 14:34:40,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 44 [2022-04-06 14:34:40,484 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-04-06 14:34:40,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2022-04-06 14:34:41,284 INFO L356 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2022-04-06 14:34:41,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 49 [2022-04-06 14:34:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 13 proven. 91 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 14:34:41,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:47,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799819798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:47,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:47,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 26] total 33 [2022-04-06 14:34:47,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:47,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820287162] [2022-04-06 14:34:47,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820287162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:47,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:47,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:34:47,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127257937] [2022-04-06 14:34:47,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:47,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:34:47,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:47,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:34:47,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1505, Unknown=3, NotChecked=0, Total=1806 [2022-04-06 14:34:47,445 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 14:34:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:47,843 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2022-04-06 14:34:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:34:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-04-06 14:34:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:47,845 INFO L225 Difference]: With dead ends: 92 [2022-04-06 14:34:47,845 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 14:34:47,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=377, Invalid=2070, Unknown=3, NotChecked=0, Total=2450 [2022-04-06 14:34:47,846 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 79 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:47,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 56 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:34:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 14:34:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2022-04-06 14:34:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 14:34:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-04-06 14:34:47,857 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 61 [2022-04-06 14:34:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:47,857 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-04-06 14:34:47,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 14:34:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-04-06 14:34:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 14:34:47,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:47,859 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:47,865 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 14:34:48,063 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 14:34:48,063 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1064833926, now seen corresponding path program 13 times [2022-04-06 14:34:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:48,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861821671] [2022-04-06 14:34:48,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:48,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:48,066 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:48,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1064833926, now seen corresponding path program 14 times [2022-04-06 14:34:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063495923] [2022-04-06 14:34:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:34:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:34:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:34:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:34:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 14:34:48,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063495923] [2022-04-06 14:34:48,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063495923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:48,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226649474] [2022-04-06 14:34:48,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:34:48,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:48,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:48,227 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 14:34:48,251 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 14:34:48,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:34:48,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:48,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 14:34:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:48,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:48,604 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:48,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:49,017 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:49,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:49,438 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:49,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:49,814 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:49,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:50,048 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:50,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:50,416 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:50,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:50,617 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:50,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 14:34:50,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:34:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226649474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:54,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:34:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 24 [2022-04-06 14:34:54,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:34:54,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861821671] [2022-04-06 14:34:54,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861821671] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:34:54,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:34:54,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:34:54,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225545640] [2022-04-06 14:34:54,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:34:54,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:34:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:54,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:34:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=663, Unknown=2, NotChecked=0, Total=756 [2022-04-06 14:34:54,336 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 14:34:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:34:54,783 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-04-06 14:34:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:34:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-04-06 14:34:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:34:54,785 INFO L225 Difference]: With dead ends: 100 [2022-04-06 14:34:54,785 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 14:34:54,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=138, Invalid=1120, Unknown=2, NotChecked=0, Total=1260 [2022-04-06 14:34:54,786 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 14:34:54,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 69 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 14:34:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 14:34:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2022-04-06 14:34:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 14:34:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-04-06 14:34:54,798 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 69 [2022-04-06 14:34:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:34:54,798 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-04-06 14:34:54,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 14:34:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-04-06 14:34:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 14:34:54,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:34:54,799 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:34:54,822 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 14:34:55,020 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 14:34:55,021 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:34:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:34:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1471639009, now seen corresponding path program 15 times [2022-04-06 14:34:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:34:55,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684723889] [2022-04-06 14:34:55,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:34:55,023 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:34:55,023 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:34:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1471639009, now seen corresponding path program 16 times [2022-04-06 14:34:55,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:34:55,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548758677] [2022-04-06 14:34:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:34:55,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:34:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:34:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:34:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:34:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:34:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:34:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:34:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:34:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:34:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:34:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:34:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 14:34:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:34:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548758677] [2022-04-06 14:34:55,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548758677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:34:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162929589] [2022-04-06 14:34:55,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:34:55,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:34:55,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:34:55,218 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 14:34:55,220 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 14:34:55,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:34:55,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:34:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 14:34:55,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:34:55,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:34:55,597 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:55,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:55,918 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:55,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:56,287 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:56,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:56,627 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:56,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:57,122 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:57,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:57,355 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:57,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:57,572 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:34:57,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:34:57,743 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:34:57,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:34:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 14:34:57,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:01,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162929589] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:01,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:35:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 25 [2022-04-06 14:35:01,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:01,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684723889] [2022-04-06 14:35:01,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684723889] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:01,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:01,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:35:01,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899569555] [2022-04-06 14:35:01,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:01,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:35:01,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:01,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:35:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=716, Unknown=2, NotChecked=0, Total=812 [2022-04-06 14:35:01,524 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 14:35:02,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:02,040 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2022-04-06 14:35:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:35:02,040 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-04-06 14:35:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:02,041 INFO L225 Difference]: With dead ends: 108 [2022-04-06 14:35:02,041 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 14:35:02,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 73 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=147, Invalid=1257, Unknown=2, NotChecked=0, Total=1406 [2022-04-06 14:35:02,042 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:02,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 77 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:35:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 14:35:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-04-06 14:35:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 14:35:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-04-06 14:35:02,056 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 77 [2022-04-06 14:35:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:02,056 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-04-06 14:35:02,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 14:35:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-04-06 14:35:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 14:35:02,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:02,057 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:02,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:35:02,271 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 14:35:02,272 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:02,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:02,272 INFO L85 PathProgramCache]: Analyzing trace with hash -2075116228, now seen corresponding path program 17 times [2022-04-06 14:35:02,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:02,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111619521] [2022-04-06 14:35:02,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:02,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:02,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2075116228, now seen corresponding path program 18 times [2022-04-06 14:35:02,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:02,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839759277] [2022-04-06 14:35:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:02,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 14:35:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839759277] [2022-04-06 14:35:02,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839759277] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:02,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044298029] [2022-04-06 14:35:02,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:35:02,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:02,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:02,464 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 14:35:02,465 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 14:35:03,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 14:35:03,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 14:35:03,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:04,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 14:35:04,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 14:35:04,090 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-06 14:35:04,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 30 [2022-04-06 14:35:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 24 proven. 153 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 14:35:04,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:04,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 14:35:04,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:04,331 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:35:04,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 14:35:04,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:04,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-04-06 14:35:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:04,376 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:35:04,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 16 [2022-04-06 14:35:04,390 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:35:04,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-04-06 14:35:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 14:35:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044298029] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:05,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:05,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 19] total 35 [2022-04-06 14:35:05,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:05,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111619521] [2022-04-06 14:35:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111619521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:05,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:05,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:35:05,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549827405] [2022-04-06 14:35:05,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:05,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:35:05,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:05,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:35:05,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:35:05,258 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 14:35:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:05,764 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-04-06 14:35:05,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:35:05,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-04-06 14:35:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:05,765 INFO L225 Difference]: With dead ends: 116 [2022-04-06 14:35:05,765 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 14:35:05,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 14:35:05,767 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:05,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 50 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 14:35:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 14:35:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 62. [2022-04-06 14:35:05,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 14:35:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-04-06 14:35:05,780 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 85 [2022-04-06 14:35:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:05,780 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-04-06 14:35:05,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 14:35:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-04-06 14:35:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 14:35:05,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:05,782 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:05,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 14:35:05,987 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 14:35:05,987 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1560444521, now seen corresponding path program 19 times [2022-04-06 14:35:05,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:05,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1520430606] [2022-04-06 14:35:05,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:05,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:05,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1560444521, now seen corresponding path program 20 times [2022-04-06 14:35:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:05,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067408486] [2022-04-06 14:35:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:05,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 14:35:06,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:06,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067408486] [2022-04-06 14:35:06,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067408486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424958037] [2022-04-06 14:35:06,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:35:06,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:06,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:06,232 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 14:35:06,241 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 14:35:06,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:35:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 14:35:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:06,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:35:06,663 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:06,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:06,873 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:06,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:07,116 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:07,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:07,314 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:07,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:07,521 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:07,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:07,777 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:07,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:07,996 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:07,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:08,321 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:08,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:08,549 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:08,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:08,821 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:35:08,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:35:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-04-06 14:35:08,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:12,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424958037] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:12,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:35:12,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 27 [2022-04-06 14:35:12,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:12,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1520430606] [2022-04-06 14:35:12,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1520430606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:12,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:12,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 14:35:12,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432990769] [2022-04-06 14:35:12,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:12,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 14:35:12,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:12,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 14:35:12,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=886, Unknown=2, NotChecked=0, Total=992 [2022-04-06 14:35:12,605 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 14:35:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:13,389 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-04-06 14:35:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:35:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-04-06 14:35:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:13,390 INFO L225 Difference]: With dead ends: 124 [2022-04-06 14:35:13,390 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 14:35:13,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 93 SyntacticMatches, 14 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=169, Invalid=1635, Unknown=2, NotChecked=0, Total=1806 [2022-04-06 14:35:13,391 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 109 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:13,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 93 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 14:35:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 14:35:13,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2022-04-06 14:35:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 14:35:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-04-06 14:35:13,410 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 93 [2022-04-06 14:35:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:13,412 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-04-06 14:35:13,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 14:35:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-04-06 14:35:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 14:35:13,414 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:13,414 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:13,440 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 14:35:13,627 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 14:35:13,627 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1501938958, now seen corresponding path program 21 times [2022-04-06 14:35:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350959398] [2022-04-06 14:35:13,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:13,630 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:13,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:13,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1501938958, now seen corresponding path program 22 times [2022-04-06 14:35:13,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065143712] [2022-04-06 14:35:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:13,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:35:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 14:35:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065143712] [2022-04-06 14:35:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065143712] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114176272] [2022-04-06 14:35:13,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:35:13,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:13,883 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 14:35:13,885 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 14:35:13,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:35:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 126 conjunts are in the unsatisfiable core [2022-04-06 14:35:13,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:14,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:35:14,295 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:14,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:14,616 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:14,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:14,812 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:14,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:15,036 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:15,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:15,385 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:15,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:15,611 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:15,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:15,854 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:15,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:16,072 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:16,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:16,464 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:16,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:16,698 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:16,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:16,909 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:35:16,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:35:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 14:35:17,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114176272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:20,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:35:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-04-06 14:35:20,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350959398] [2022-04-06 14:35:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350959398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:20,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 14:35:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734363363] [2022-04-06 14:35:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:20,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 14:35:20,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 14:35:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=887, Unknown=2, NotChecked=0, Total=992 [2022-04-06 14:35:20,727 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 14:35:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:21,666 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2022-04-06 14:35:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:35:21,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2022-04-06 14:35:21,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:21,668 INFO L225 Difference]: With dead ends: 132 [2022-04-06 14:35:21,668 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 14:35:21,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 99 SyntacticMatches, 19 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=174, Invalid=1716, Unknown=2, NotChecked=0, Total=1892 [2022-04-06 14:35:21,669 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:21,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 81 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:35:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 14:35:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 70. [2022-04-06 14:35:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 14:35:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-04-06 14:35:21,690 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 101 [2022-04-06 14:35:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:21,690 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-04-06 14:35:21,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 14:35:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-04-06 14:35:21,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 14:35:21,691 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:21,691 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:21,712 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 14:35:21,906 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 14:35:21,906 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:21,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1769903795, now seen corresponding path program 23 times [2022-04-06 14:35:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:21,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [618486456] [2022-04-06 14:35:21,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:21,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:21,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1769903795, now seen corresponding path program 24 times [2022-04-06 14:35:21,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:21,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143416222] [2022-04-06 14:35:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:21,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:35:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:35:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 14:35:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:22,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143416222] [2022-04-06 14:35:22,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143416222] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:22,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219814981] [2022-04-06 14:35:22,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:35:22,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:22,189 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 14:35:22,212 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 14:35:31,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 14:35:31,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:31,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 14:35:31,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:31,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 14:35:31,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 14:35:31,929 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-06 14:35:31,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 30 [2022-04-06 14:35:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-04-06 14:35:32,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:32,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 14:35:32,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:32,199 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:35:32,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 14:35:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:35:32,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-04-06 14:35:32,255 INFO L356 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-04-06 14:35:32,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 28 [2022-04-06 14:35:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 14:35:33,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219814981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:35:33,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:35:33,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 22] total 41 [2022-04-06 14:35:33,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:33,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [618486456] [2022-04-06 14:35:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [618486456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:33,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 14:35:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224123595] [2022-04-06 14:35:33,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:33,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 14:35:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:33,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 14:35:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 14:35:33,351 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 14:35:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:34,325 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2022-04-06 14:35:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 14:35:34,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2022-04-06 14:35:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:34,327 INFO L225 Difference]: With dead ends: 140 [2022-04-06 14:35:34,327 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 14:35:34,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=612, Invalid=2250, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 14:35:34,329 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:34,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 89 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:35:34,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 14:35:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 74. [2022-04-06 14:35:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 14:35:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2022-04-06 14:35:34,346 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 109 [2022-04-06 14:35:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:34,346 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2022-04-06 14:35:34,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 14:35:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2022-04-06 14:35:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 14:35:34,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:34,347 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:34,355 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 14:35:34,554 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 14:35:34,555 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:34,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:34,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321752, now seen corresponding path program 25 times [2022-04-06 14:35:34,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340882693] [2022-04-06 14:35:34,557 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:34,557 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:34,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1882321752, now seen corresponding path program 26 times [2022-04-06 14:35:34,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:34,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672233687] [2022-04-06 14:35:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:35:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:35:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:35:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 14:35:34,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672233687] [2022-04-06 14:35:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672233687] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531874122] [2022-04-06 14:35:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:35:34,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:34,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:34,856 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 14:35:34,858 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 14:35:34,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:35:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 146 conjunts are in the unsatisfiable core [2022-04-06 14:35:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:35,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:35:35,353 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:35,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:35,602 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:35,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:35,820 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:35,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:36,031 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:36,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:36,272 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:36,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:36,510 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:36,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:36,744 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:36,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:37,110 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:37,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:37,517 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:37,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:37,917 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:37,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:38,129 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:38,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:38,362 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:38,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:38,544 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:35:38,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:35:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 48 proven. 37 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-04-06 14:35:38,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531874122] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:42,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:35:42,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-04-06 14:35:42,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340882693] [2022-04-06 14:35:42,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340882693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:42,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:42,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 14:35:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520342447] [2022-04-06 14:35:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:42,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 14:35:42,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:42,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 14:35:42,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1011, Unknown=2, NotChecked=0, Total=1122 [2022-04-06 14:35:42,447 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 14:35:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:43,621 INFO L93 Difference]: Finished difference Result 148 states and 178 transitions. [2022-04-06 14:35:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 14:35:43,622 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 117 [2022-04-06 14:35:43,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:43,623 INFO L225 Difference]: With dead ends: 148 [2022-04-06 14:35:43,623 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 14:35:43,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 117 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=192, Invalid=2062, Unknown=2, NotChecked=0, Total=2256 [2022-04-06 14:35:43,625 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 129 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:43,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 127 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:35:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 14:35:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 78. [2022-04-06 14:35:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 14:35:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2022-04-06 14:35:43,644 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 117 [2022-04-06 14:35:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:43,644 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2022-04-06 14:35:43,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 14:35:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2022-04-06 14:35:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 14:35:43,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:43,645 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:43,671 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 14:35:43,867 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 14:35:43,868 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:43,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:43,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1004854013, now seen corresponding path program 27 times [2022-04-06 14:35:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [903081619] [2022-04-06 14:35:43,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:43,872 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:43,872 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:43,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1004854013, now seen corresponding path program 28 times [2022-04-06 14:35:43,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9972904] [2022-04-06 14:35:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:35:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:35:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:35:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:35:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 14:35:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9972904] [2022-04-06 14:35:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9972904] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279505839] [2022-04-06 14:35:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:35:44,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:44,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:44,158 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 14:35:44,187 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 14:35:44,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:35:44,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:35:44,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 150 conjunts are in the unsatisfiable core [2022-04-06 14:35:44,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:35:44,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:35:44,669 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:44,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:44,903 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:44,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:45,144 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:45,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:45,375 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:45,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:45,623 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:45,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:45,860 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:45,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:46,102 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:46,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:46,370 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:46,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:46,580 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:46,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:46,887 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:46,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:47,300 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:47,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:47,656 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:47,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:47,899 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:35:47,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:35:48,192 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:35:48,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:35:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 14:35:48,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:35:51,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279505839] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:51,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:35:51,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2022-04-06 14:35:51,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:35:51,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [903081619] [2022-04-06 14:35:51,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [903081619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:35:51,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:35:51,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 14:35:51,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943870866] [2022-04-06 14:35:51,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:35:51,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 14:35:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 14:35:51,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1076, Unknown=2, NotChecked=0, Total=1190 [2022-04-06 14:35:51,646 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 14:35:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:35:52,692 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2022-04-06 14:35:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 14:35:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 125 [2022-04-06 14:35:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:35:52,694 INFO L225 Difference]: With dead ends: 156 [2022-04-06 14:35:52,694 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 14:35:52,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 122 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=201, Invalid=2247, Unknown=2, NotChecked=0, Total=2450 [2022-04-06 14:35:52,695 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 165 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:35:52,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 65 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 14:35:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 14:35:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 82. [2022-04-06 14:35:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 14:35:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-04-06 14:35:52,714 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 125 [2022-04-06 14:35:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:35:52,714 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-04-06 14:35:52,714 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 14:35:52,714 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-04-06 14:35:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 14:35:52,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:35:52,715 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:35:52,734 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 14:35:52,922 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 14:35:52,922 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:35:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:35:52,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2049159774, now seen corresponding path program 29 times [2022-04-06 14:35:52,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:35:52,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016303617] [2022-04-06 14:35:52,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:35:52,927 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:35:52,927 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:35:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2049159774, now seen corresponding path program 30 times [2022-04-06 14:35:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:35:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634984858] [2022-04-06 14:35:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:35:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:35:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:35:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:35:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:35:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:35:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:35:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:35:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:35:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:35:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:35:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:35:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:35:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:35:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:35:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:35:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:35:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:35:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:35:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 14:35:53,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:35:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634984858] [2022-04-06 14:35:53,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634984858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:35:53,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334017080] [2022-04-06 14:35:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:35:53,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:35:53,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:35:53,220 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 14:35:53,247 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 14:38:47,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 14:38:47,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 14:38:47,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:48,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 14:38:48,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 14:38:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 14:38:48,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 11 [2022-04-06 14:38:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 42 proven. 435 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 14:38:48,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:38:48,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 14:38:48,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:38:48,590 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:38:48,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 14:38:48,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 14:38:48,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 4 [2022-04-06 14:38:48,621 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 14:38:48,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-04-06 14:38:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 14:38:50,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334017080] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:38:50,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:38:50,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 25] total 47 [2022-04-06 14:38:50,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:38:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016303617] [2022-04-06 14:38:50,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016303617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:38:50,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:38:50,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 14:38:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468359588] [2022-04-06 14:38:50,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:38:50,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 14:38:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 14:38:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=1704, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 14:38:50,103 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 14:38:51,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:38:51,400 INFO L93 Difference]: Finished difference Result 164 states and 198 transitions. [2022-04-06 14:38:51,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 14:38:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 133 [2022-04-06 14:38:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:38:51,402 INFO L225 Difference]: With dead ends: 164 [2022-04-06 14:38:51,402 INFO L226 Difference]: Without dead ends: 153 [2022-04-06 14:38:51,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=840, Invalid=3066, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 14:38:51,403 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 159 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2225 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:38:51,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 108 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2225 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 14:38:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-06 14:38:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 86. [2022-04-06 14:38:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 14:38:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-04-06 14:38:51,424 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 133 [2022-04-06 14:38:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:38:51,425 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-04-06 14:38:51,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 14:38:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-04-06 14:38:51,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 14:38:51,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:38:51,426 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:38:51,446 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 14:38:51,628 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 14:38:51,628 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:38:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:38:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash 228766905, now seen corresponding path program 31 times [2022-04-06 14:38:51,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:38:51,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698327294] [2022-04-06 14:38:51,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:38:51,630 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:38:51,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:38:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 228766905, now seen corresponding path program 32 times [2022-04-06 14:38:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:38:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071549723] [2022-04-06 14:38:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:38:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:38:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:38:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:38:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:38:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:38:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:38:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:38:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:38:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:38:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:38:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:38:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:38:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:38:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:38:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:38:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:38:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:38:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:38:51,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:38:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 14:38:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:38:51,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071549723] [2022-04-06 14:38:51,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071549723] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:38:51,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295242588] [2022-04-06 14:38:51,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:38:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:38:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:38:51,944 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 14:38:51,945 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 14:38:52,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:38:52,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:38:52,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 178 conjunts are in the unsatisfiable core [2022-04-06 14:38:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:38:52,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:38:52,433 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:52,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:52,771 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:52,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:53,012 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:53,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:53,268 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:53,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:53,520 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:53,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:53,794 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:53,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:53,994 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:53,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:54,330 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:54,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:54,592 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:54,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:54,830 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:54,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:55,077 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:55,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:55,330 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:55,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:55,567 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:55,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:55,807 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:55,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:56,055 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:38:56,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:38:56,256 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:38:56,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:38:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 60 proven. 46 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-04-06 14:38:56,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295242588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:06,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:39:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2022-04-06 14:39:06,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698327294] [2022-04-06 14:39:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698327294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:06,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:06,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 14:39:06,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410471771] [2022-04-06 14:39:06,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:06,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 14:39:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:06,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 14:39:06,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1345, Unknown=2, NotChecked=0, Total=1482 [2022-04-06 14:39:06,886 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 14:39:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:08,221 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2022-04-06 14:39:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 14:39:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 141 [2022-04-06 14:39:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:08,222 INFO L225 Difference]: With dead ends: 172 [2022-04-06 14:39:08,222 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 14:39:08,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 142 SyntacticMatches, 32 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=237, Invalid=2841, Unknown=2, NotChecked=0, Total=3080 [2022-04-06 14:39:08,223 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 183 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:08,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 76 Invalid, 2395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 2193 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 14:39:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 14:39:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 90. [2022-04-06 14:39:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 14:39:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-04-06 14:39:08,248 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 141 [2022-04-06 14:39:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:08,248 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-04-06 14:39:08,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 14:39:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-04-06 14:39:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 14:39:08,249 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:08,249 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:08,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 14:39:08,459 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 14:39:08,460 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:08,460 INFO L85 PathProgramCache]: Analyzing trace with hash -279761900, now seen corresponding path program 33 times [2022-04-06 14:39:08,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:08,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1449366755] [2022-04-06 14:39:08,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:39:08,462 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:39:08,462 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:39:08,462 INFO L85 PathProgramCache]: Analyzing trace with hash -279761900, now seen corresponding path program 34 times [2022-04-06 14:39:08,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:08,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646190652] [2022-04-06 14:39:08,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:39:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:39:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:39:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:39:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:39:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:39:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:39:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:39:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:39:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:39:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:39:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:39:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:39:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:39:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:39:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:39:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:39:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 14:39:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646190652] [2022-04-06 14:39:08,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646190652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362537300] [2022-04-06 14:39:08,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:39:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:08,792 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 14:39:08,823 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 14:39:08,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:39:08,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:39:08,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 182 conjunts are in the unsatisfiable core [2022-04-06 14:39:08,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:39:09,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:39:09,311 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:09,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:09,507 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:09,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:09,728 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:09,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:10,112 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:10,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:10,372 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:10,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:10,726 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:10,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:11,072 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:11,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:11,320 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:11,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:11,566 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:11,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:11,802 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:11,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:12,011 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:12,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:12,233 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:12,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:12,501 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:12,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:12,744 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:12,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:12,954 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:12,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:13,294 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:39:13,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:39:13,598 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:39:13,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:39:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 14:39:13,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:39:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362537300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:17,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:39:17,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2022-04-06 14:39:17,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:39:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1449366755] [2022-04-06 14:39:17,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1449366755] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:39:17,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:39:17,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 14:39:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288286040] [2022-04-06 14:39:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:39:17,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 14:39:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 14:39:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1355, Unknown=2, NotChecked=0, Total=1482 [2022-04-06 14:39:17,597 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 14:39:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:39:19,073 INFO L93 Difference]: Finished difference Result 180 states and 218 transitions. [2022-04-06 14:39:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 14:39:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 149 [2022-04-06 14:39:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:39:19,074 INFO L225 Difference]: With dead ends: 180 [2022-04-06 14:39:19,074 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 14:39:19,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 151 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=232, Invalid=2958, Unknown=2, NotChecked=0, Total=3192 [2022-04-06 14:39:19,076 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:39:19,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 79 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 14:39:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 14:39:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 94. [2022-04-06 14:39:19,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 14:39:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2022-04-06 14:39:19,102 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 149 [2022-04-06 14:39:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:39:19,102 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2022-04-06 14:39:19,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 14:39:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2022-04-06 14:39:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 14:39:19,103 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:39:19,103 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:39:19,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 14:39:19,311 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 14:39:19,311 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:39:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:39:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1527768977, now seen corresponding path program 35 times [2022-04-06 14:39:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:39:19,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95140672] [2022-04-06 14:39:19,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:39:19,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:39:19,314 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:39:19,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1527768977, now seen corresponding path program 36 times [2022-04-06 14:39:19,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:39:19,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914506431] [2022-04-06 14:39:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:39:19,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:39:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:39:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:39:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:39:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:39:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:39:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:39:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:39:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:39:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:39:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:39:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:39:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:39:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:39:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:39:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:39:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:39:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:39:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:39:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:39:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:39:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 14:39:19,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:39:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914506431] [2022-04-06 14:39:19,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914506431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:39:19,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837508341] [2022-04-06 14:39:19,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:39:19,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:39:19,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:39:19,683 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 14:39:19,686 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 14:40:21,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 14:40:21,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 120 conjunts are in the unsatisfiable core [2022-04-06 14:40:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:21,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 14:40:21,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 14:40:22,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 87 [2022-04-06 14:40:22,038 INFO L356 Elim1Store]: treesize reduction 116, result has 10.1 percent of original size [2022-04-06 14:40:22,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 122 [2022-04-06 14:40:22,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:22,271 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:22,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:22,300 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-04-06 14:40:22,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-04-06 14:40:22,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:22,480 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:22,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:22,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-04-06 14:40:22,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:22,715 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:22,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:22,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:22,883 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:22,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:22,910 INFO L356 Elim1Store]: treesize reduction 145, result has 4.6 percent of original size [2022-04-06 14:40:22,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 36 [2022-04-06 14:40:23,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:23,075 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:23,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:23,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-04-06 14:40:23,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:23,290 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:23,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:23,492 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:23,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:23,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-04-06 14:40:23,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-04-06 14:40:23,741 INFO L356 Elim1Store]: treesize reduction 60, result has 7.7 percent of original size [2022-04-06 14:40:23,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 107 [2022-04-06 14:40:23,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-04-06 14:40:24,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 72 [2022-04-06 14:40:24,102 INFO L356 Elim1Store]: treesize reduction 68, result has 6.8 percent of original size [2022-04-06 14:40:24,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 115 [2022-04-06 14:40:24,555 INFO L356 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-04-06 14:40:24,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 56 [2022-04-06 14:40:24,975 INFO L356 Elim1Store]: treesize reduction 56, result has 37.1 percent of original size [2022-04-06 14:40:24,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 76 [2022-04-06 14:40:25,683 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-04-06 14:40:25,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 88 [2022-04-06 14:40:26,500 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-04-06 14:40:26,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 97 [2022-04-06 14:40:27,432 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-04-06 14:40:27,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 106 [2022-04-06 14:40:28,765 INFO L356 Elim1Store]: treesize reduction 64, result has 28.1 percent of original size [2022-04-06 14:40:28,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 115 [2022-04-06 14:40:30,798 INFO L356 Elim1Store]: treesize reduction 72, result has 25.8 percent of original size [2022-04-06 14:40:30,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 128 [2022-04-06 14:40:33,244 INFO L356 Elim1Store]: treesize reduction 112, result has 2.6 percent of original size [2022-04-06 14:40:33,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 64 [2022-04-06 14:40:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 163 proven. 733 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 14:40:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:42,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837508341] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:42,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:40:42,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 49] total 68 [2022-04-06 14:40:42,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:42,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95140672] [2022-04-06 14:40:42,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95140672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:42,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:42,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 14:40:42,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765393346] [2022-04-06 14:40:42,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:42,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 14:40:42,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:42,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 14:40:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1151, Invalid=6152, Unknown=7, NotChecked=0, Total=7310 [2022-04-06 14:40:42,130 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 14:40:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:44,058 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-04-06 14:40:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 14:40:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 157 [2022-04-06 14:40:44,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:44,059 INFO L225 Difference]: With dead ends: 188 [2022-04-06 14:40:44,059 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 14:40:44,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 136 SyntacticMatches, 53 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4796 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1510, Invalid=9403, Unknown=7, NotChecked=0, Total=10920 [2022-04-06 14:40:44,062 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 181 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 3472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:44,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 137 Invalid, 3472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 14:40:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 14:40:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 98. [2022-04-06 14:40:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 22 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 14:40:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 117 transitions. [2022-04-06 14:40:44,089 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 117 transitions. Word has length 157 [2022-04-06 14:40:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:44,090 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 117 transitions. [2022-04-06 14:40:44,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 20 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 14:40:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 117 transitions. [2022-04-06 14:40:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 14:40:44,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:44,092 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:44,104 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 14:40:44,301 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 14:40:44,301 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -919307830, now seen corresponding path program 37 times [2022-04-06 14:40:44,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808906902] [2022-04-06 14:40:44,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:40:44,303 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:40:44,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:40:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash -919307830, now seen corresponding path program 38 times [2022-04-06 14:40:44,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:44,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004157083] [2022-04-06 14:40:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:40:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:40:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:40:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:40:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:40:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:40:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:40:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:40:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:40:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:40:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:40:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:40:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:40:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:40:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:40:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:40:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:40:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:40:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 14:40:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-06 14:40:44,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004157083] [2022-04-06 14:40:44,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004157083] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:44,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508472900] [2022-04-06 14:40:44,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:40:44,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:44,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:44,712 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 14:40:44,739 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 14:40:44,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:40:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:44,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 208 conjunts are in the unsatisfiable core [2022-04-06 14:40:44,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:44,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:40:45,251 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:45,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:45,504 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:45,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:45,867 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:45,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:46,220 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:46,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:46,484 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:46,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:46,836 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:46,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:47,192 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:47,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:47,548 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:47,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:47,930 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:47,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:48,204 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:48,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:48,408 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:48,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:48,664 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:48,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:48,914 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:48,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:49,164 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:49,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:49,420 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:49,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:49,775 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:49,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:50,035 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:50,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:50,278 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:50,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:50,511 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:40:50,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:40:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 72 proven. 55 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2022-04-06 14:40:50,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:40:54,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508472900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:54,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:40:54,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 36 [2022-04-06 14:40:54,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:40:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808906902] [2022-04-06 14:40:54,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808906902] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:40:54,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:40:54,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 14:40:54,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498253830] [2022-04-06 14:40:54,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:40:54,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 14:40:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 14:40:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1507, Unknown=2, NotChecked=0, Total=1640 [2022-04-06 14:40:54,556 INFO L87 Difference]: Start difference. First operand 98 states and 117 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 14:40:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:40:56,495 INFO L93 Difference]: Finished difference Result 196 states and 238 transitions. [2022-04-06 14:40:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 14:40:56,495 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 165 [2022-04-06 14:40:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:40:56,496 INFO L225 Difference]: With dead ends: 196 [2022-04-06 14:40:56,496 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 14:40:56,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 161 SyntacticMatches, 36 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=250, Invalid=3408, Unknown=2, NotChecked=0, Total=3660 [2022-04-06 14:40:56,498 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 197 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 3668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:40:56,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 125 Invalid, 3668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 3446 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 14:40:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 14:40:56,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 102. [2022-04-06 14:40:56,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 23 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 14:40:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2022-04-06 14:40:56,523 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 165 [2022-04-06 14:40:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:40:56,523 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2022-04-06 14:40:56,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 21 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 14:40:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2022-04-06 14:40:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 14:40:56,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:40:56,525 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:40:56,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-04-06 14:40:56,731 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 14:40:56,731 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:40:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:40:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash 198922277, now seen corresponding path program 39 times [2022-04-06 14:40:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:40:56,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [440290748] [2022-04-06 14:40:56,733 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:40:56,733 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:40:56,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:40:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash 198922277, now seen corresponding path program 40 times [2022-04-06 14:40:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:40:56,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618057132] [2022-04-06 14:40:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:40:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:40:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:40:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:40:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:40:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:40:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:40:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:40:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:40:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:40:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:40:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:40:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:40:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:40:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:40:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:40:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:40:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:40:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:40:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:40:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:40:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 14:40:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 14:40:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:40:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 14:40:57,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:40:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618057132] [2022-04-06 14:40:57,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618057132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:40:57,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574573736] [2022-04-06 14:40:57,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:40:57,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:40:57,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:40:57,191 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 14:40:57,220 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 14:40:57,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:40:57,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:40:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 212 conjunts are in the unsatisfiable core [2022-04-06 14:40:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:40:57,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:40:57,737 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:57,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:58,008 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:58,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:58,265 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:58,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:58,535 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:58,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:58,833 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:58,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:59,198 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:59,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:59,464 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:59,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:40:59,721 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:40:59,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:00,076 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:00,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:00,287 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:00,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:00,505 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:00,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:00,760 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:00,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:01,020 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:01,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:01,231 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:01,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:01,610 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:01,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:01,972 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:01,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:02,238 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:02,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:02,517 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:02,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:02,730 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:41:02,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:41:03,038 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:41:03,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:41:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 76 proven. 58 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 14:41:03,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:41:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574573736] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:07,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:41:07,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 37 [2022-04-06 14:41:07,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:41:07,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [440290748] [2022-04-06 14:41:07,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [440290748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:41:07,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:41:07,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 14:41:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827477164] [2022-04-06 14:41:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:41:07,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 14:41:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 14:41:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1586, Unknown=2, NotChecked=0, Total=1722 [2022-04-06 14:41:07,002 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 14:41:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:41:08,968 INFO L93 Difference]: Finished difference Result 204 states and 248 transitions. [2022-04-06 14:41:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 14:41:08,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 173 [2022-04-06 14:41:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:41:08,970 INFO L225 Difference]: With dead ends: 204 [2022-04-06 14:41:08,970 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 14:41:08,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 172 SyntacticMatches, 35 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=259, Invalid=3645, Unknown=2, NotChecked=0, Total=3906 [2022-04-06 14:41:08,971 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 217 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 14:41:08,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 103 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 14:41:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 14:41:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 106. [2022-04-06 14:41:08,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 24 states have call successors, (24), 4 states have call predecessors, (24), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 14:41:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-04-06 14:41:08,996 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 173 [2022-04-06 14:41:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:41:08,997 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-04-06 14:41:08,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 22 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 14:41:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-04-06 14:41:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 14:41:08,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:41:08,998 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:41:09,016 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 14:41:09,199 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 14:41:09,200 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:41:09,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:41:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 832543616, now seen corresponding path program 41 times [2022-04-06 14:41:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:41:09,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1716580514] [2022-04-06 14:41:09,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:41:09,202 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:41:09,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:41:09,202 INFO L85 PathProgramCache]: Analyzing trace with hash 832543616, now seen corresponding path program 42 times [2022-04-06 14:41:09,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:41:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092568965] [2022-04-06 14:41:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:41:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:41:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:41:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:41:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:41:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:41:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:41:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:41:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:41:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:41:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:41:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:41:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:41:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:41:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:41:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:41:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:41:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:41:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:41:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:41:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:41:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 14:41:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 14:41:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-06 14:41:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:41:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 14:41:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:41:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092568965] [2022-04-06 14:41:09,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092568965] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:41:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577050434] [2022-04-06 14:41:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:41:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:41:09,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:41:09,660 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 14:41:09,662 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 14:47:57,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 14:47:57,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:47:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 14:47:57,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:47:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 14:47:57,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 14:48:00,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577050434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:00,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:00,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 26] total 50 [2022-04-06 14:48:00,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1716580514] [2022-04-06 14:48:00,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1716580514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:00,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:00,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 14:48:00,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592194834] [2022-04-06 14:48:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:00,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 14:48:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 14:48:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=1781, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 14:48:00,566 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 14:48:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:02,834 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions. [2022-04-06 14:48:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 14:48:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 181 [2022-04-06 14:48:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:02,837 INFO L225 Difference]: With dead ends: 212 [2022-04-06 14:48:02,837 INFO L226 Difference]: Without dead ends: 201 [2022-04-06 14:48:02,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1305, Invalid=3807, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 14:48:02,838 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 201 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4556 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 4786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 4556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:02,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 171 Invalid, 4786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 4556 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 14:48:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-04-06 14:48:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 110. [2022-04-06 14:48:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 14:48:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2022-04-06 14:48:02,872 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 181 [2022-04-06 14:48:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:02,872 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2022-04-06 14:48:02,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 23 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 14:48:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2022-04-06 14:48:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 14:48:02,873 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:02,873 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:02,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 14:48:03,073 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 14:48:03,074 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash 339499995, now seen corresponding path program 43 times [2022-04-06 14:48:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:03,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1573141362] [2022-04-06 14:48:03,076 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:48:03,076 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:48:03,076 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:48:03,076 INFO L85 PathProgramCache]: Analyzing trace with hash 339499995, now seen corresponding path program 44 times [2022-04-06 14:48:03,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:03,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740110506] [2022-04-06 14:48:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:03,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:48:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:48:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:48:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:48:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:48:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:48:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:48:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:48:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:48:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:48:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:48:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:48:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:48:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:48:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:48:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:48:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:48:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:48:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 14:48:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 14:48:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-06 14:48:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 14:48:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 14:48:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740110506] [2022-04-06 14:48:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740110506] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97893964] [2022-04-06 14:48:03,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:48:03,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:03,573 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 14:48:03,606 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 14:48:03,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:48:03,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:03,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 240 conjunts are in the unsatisfiable core [2022-04-06 14:48:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:03,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:48:04,166 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:04,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:04,517 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:04,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:04,781 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:04,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:05,135 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:05,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:05,402 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:05,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:05,662 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:05,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:05,930 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:05,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:06,304 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:06,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:06,512 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:06,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:06,874 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:06,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:07,234 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:07,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:07,491 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:07,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:07,750 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:07,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:08,012 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:08,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:08,285 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:08,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:08,631 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:08,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:08,831 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:08,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:09,097 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:09,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:09,351 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:09,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:09,717 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:09,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:09,971 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:09,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:10,298 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 14:48:10,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 14:48:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-04-06 14:48:10,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:14,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97893964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:14,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 14:48:14,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 39 [2022-04-06 14:48:14,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:14,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1573141362] [2022-04-06 14:48:14,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1573141362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:14,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:14,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 14:48:14,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826944431] [2022-04-06 14:48:14,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:14,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 14:48:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 14:48:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1668, Unknown=2, NotChecked=0, Total=1806 [2022-04-06 14:48:14,269 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 14:48:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:16,850 INFO L93 Difference]: Finished difference Result 220 states and 268 transitions. [2022-04-06 14:48:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 14:48:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 189 [2022-04-06 14:48:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:16,851 INFO L225 Difference]: With dead ends: 220 [2022-04-06 14:48:16,852 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 14:48:16,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 187 SyntacticMatches, 41 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=273, Invalid=4015, Unknown=2, NotChecked=0, Total=4290 [2022-04-06 14:48:16,852 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 211 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4939 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 4939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:16,853 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 174 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 4939 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 14:48:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 14:48:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 114. [2022-04-06 14:48:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 26 states have call successors, (26), 4 states have call predecessors, (26), 3 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 14:48:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-04-06 14:48:16,879 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 189 [2022-04-06 14:48:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:16,880 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-04-06 14:48:16,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0) internal successors, (78), 25 states have internal predecessors, (78), 24 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 14:48:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-04-06 14:48:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 14:48:16,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:16,881 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:16,898 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 14:48:17,081 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 14:48:17,082 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1569943242, now seen corresponding path program 45 times [2022-04-06 14:48:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:17,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629962764] [2022-04-06 14:48:17,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 14:48:17,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-04-06 14:48:17,084 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 14:48:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1569943242, now seen corresponding path program 46 times [2022-04-06 14:48:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794908747] [2022-04-06 14:48:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 14:48:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 14:48:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 14:48:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 14:48:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 14:48:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 14:48:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 14:48:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 14:48:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 14:48:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 14:48:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 14:48:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 14:48:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 14:48:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 14:48:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 14:48:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 14:48:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 14:48:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 14:48:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 14:48:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 14:48:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-06 14:48:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 14:48:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-06 14:48:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-04-06 14:48:17,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:17,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794908747] [2022-04-06 14:48:17,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794908747] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:17,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869083104] [2022-04-06 14:48:17,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:48:17,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:17,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:17,611 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 14:48:17,642 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 14:48:17,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:48:17,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:17,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 250 conjunts are in the unsatisfiable core [2022-04-06 14:48:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:17,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 14:48:18,202 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:18,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:18,409 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:18,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:18,614 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:18,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:18,969 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:18,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:19,240 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:19,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:19,497 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:19,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:19,715 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:19,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:20,074 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:20,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:20,287 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:20,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:20,516 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:20,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:20,718 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:20,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:21,083 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:21,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 14:48:21,451 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 14:48:21,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48