/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 21:59:45,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 21:59:45,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 21:59:45,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 21:59:45,880 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 21:59:45,894 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 21:59:45,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 21:59:45,895 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 21:59:45,895 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 21:59:45,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 21:59:45,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 21:59:45,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 21:59:45,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 21:59:45,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 21:59:45,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:45,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 21:59:45,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 21:59:46,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 21:59:46,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 21:59:46,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 21:59:46,118 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 21:59:46,119 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 21:59:46,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2022-03-19 21:59:46,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f649cf88/0e732fc79f2c4e24a2f09d74d95aa1fc/FLAG600f90a54 [2022-03-19 21:59:46,502 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 21:59:46,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2022-03-19 21:59:46,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f649cf88/0e732fc79f2c4e24a2f09d74d95aa1fc/FLAG600f90a54 [2022-03-19 21:59:46,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f649cf88/0e732fc79f2c4e24a2f09d74d95aa1fc [2022-03-19 21:59:46,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 21:59:46,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 21:59:46,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:46,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 21:59:46,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 21:59:46,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b0c476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46, skipping insertion in model container [2022-03-19 21:59:46,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 21:59:46,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 21:59:46,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-03-19 21:59:46,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:46,688 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 21:59:46,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2022-03-19 21:59:46,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 21:59:46,708 INFO L208 MainTranslator]: Completed translation [2022-03-19 21:59:46,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46 WrapperNode [2022-03-19 21:59:46,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 21:59:46,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 21:59:46,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 21:59:46,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 21:59:46,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 21:59:46,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 21:59:46,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 21:59:46,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 21:59:46,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (1/1) ... [2022-03-19 21:59:46,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 21:59:46,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:46,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 21:59:46,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 21:59:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 21:59:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 21:59:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 21:59:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 21:59:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 21:59:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 21:59:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 21:59:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 21:59:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 21:59:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 21:59:46,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 21:59:46,829 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 21:59:46,830 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 21:59:47,005 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 21:59:47,009 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 21:59:47,010 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-19 21:59:47,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:47 BoogieIcfgContainer [2022-03-19 21:59:47,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 21:59:47,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 21:59:47,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 21:59:47,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 21:59:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 09:59:46" (1/3) ... [2022-03-19 21:59:47,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f43611c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:47, skipping insertion in model container [2022-03-19 21:59:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 09:59:46" (2/3) ... [2022-03-19 21:59:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f43611c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 09:59:47, skipping insertion in model container [2022-03-19 21:59:47,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 09:59:47" (3/3) ... [2022-03-19 21:59:47,017 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2022-03-19 21:59:47,020 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 21:59:47,020 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 21:59:47,064 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 21:59:47,085 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 21:59:47,086 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 21:59:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 21:59:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 21:59:47,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:47,115 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:47,116 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2022-03-19 21:59:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916757492] [2022-03-19 21:59:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:47,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:47,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916757492] [2022-03-19 21:59:47,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916757492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:47,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 21:59:47,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 21:59:47,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927675038] [2022-03-19 21:59:47,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:47,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 21:59:47,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 21:59:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 21:59:47,403 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 21:59:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:47,553 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2022-03-19 21:59:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 21:59:47,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-03-19 21:59:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:47,562 INFO L225 Difference]: With dead ends: 67 [2022-03-19 21:59:47,562 INFO L226 Difference]: Without dead ends: 30 [2022-03-19 21:59:47,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-19 21:59:47,570 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:47,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 21:59:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-19 21:59:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-19 21:59:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 21:59:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-03-19 21:59:47,609 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-03-19 21:59:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:47,609 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-03-19 21:59:47,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-19 21:59:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-03-19 21:59:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 21:59:47,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:47,610 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:47,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 21:59:47,611 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2022-03-19 21:59:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:47,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810651675] [2022-03-19 21:59:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:47,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810651675] [2022-03-19 21:59:47,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810651675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430517546] [2022-03-19 21:59:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:47,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:47,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:47,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:47,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 21:59:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 21:59:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 21:59:47,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 21:59:47,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430517546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 21:59:47,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 21:59:47,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-03-19 21:59:47,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42954201] [2022-03-19 21:59:47,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 21:59:47,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 21:59:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 21:59:47,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-03-19 21:59:47,925 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:47,956 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-19 21:59:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 21:59:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 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 17 [2022-03-19 21:59:47,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:47,957 INFO L225 Difference]: With dead ends: 49 [2022-03-19 21:59:47,957 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 21:59:47,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 21:59:47,958 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:47,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 81 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 21:59:47,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 21:59:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-03-19 21:59:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 21:59:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-03-19 21:59:47,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-03-19 21:59:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:47,962 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-03-19 21:59:47,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-03-19 21:59:47,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 21:59:47,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:47,963 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, 1, 1] [2022-03-19 21:59:47,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 21:59:48,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:48,180 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1131787334, now seen corresponding path program 1 times [2022-03-19 21:59:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805534085] [2022-03-19 21:59:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 21:59:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 21:59:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 21:59:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805534085] [2022-03-19 21:59:48,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805534085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 21:59:48,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887332738] [2022-03-19 21:59:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:48,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 21:59:48,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 21:59:48,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 21:59:48,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 21:59:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 21:59:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 21:59:48,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 21:59:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 21:59:48,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 21:59:50,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_main_~SIZE~0_29_56 Int) (aux_mod_aux_mod_main_~SIZE~0_29_56 Int)) (or (<= 0 aux_div_aux_mod_main_~SIZE~0_29_56) (<= (+ 4294967295 (* aux_div_aux_mod_main_~SIZE~0_29_56 4294967296) aux_mod_aux_mod_main_~SIZE~0_29_56) 0) (<= 4294967296 aux_mod_aux_mod_main_~SIZE~0_29_56) (< (mod c_main_~j~0 4294967296) (mod (+ (* 4294967295 aux_mod_aux_mod_main_~SIZE~0_29_56) 1) 4294967296)))) is different from false [2022-03-19 21:59:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-03-19 21:59:59,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887332738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 21:59:59,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 21:59:59,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-03-19 21:59:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847850236] [2022-03-19 21:59:59,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 21:59:59,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 21:59:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 21:59:59,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 21:59:59,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=4, NotChecked=18, Total=132 [2022-03-19 21:59:59,462 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:59,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 21:59:59,755 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-03-19 21:59:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 21:59:59,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-19 21:59:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 21:59:59,756 INFO L225 Difference]: With dead ends: 61 [2022-03-19 21:59:59,756 INFO L226 Difference]: Without dead ends: 40 [2022-03-19 21:59:59,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=4, NotChecked=30, Total=306 [2022-03-19 21:59:59,757 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 21:59:59,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 62 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 146 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-03-19 21:59:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-19 21:59:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-03-19 21:59:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 21:59:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2022-03-19 21:59:59,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 23 [2022-03-19 21:59:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 21:59:59,762 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2022-03-19 21:59:59,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 21:59:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2022-03-19 21:59:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-19 21:59:59,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 21:59:59,762 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 21:59:59,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 21:59:59,980 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 21:59:59,981 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 21:59:59,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 21:59:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 2 times [2022-03-19 21:59:59,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 21:59:59,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725718132] [2022-03-19 21:59:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 21:59:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:00,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:00,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725718132] [2022-03-19 22:00:00,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725718132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:00,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970399741] [2022-03-19 22:00:00,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:00:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:00,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:00,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:00:00,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:00:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:00,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 22:00:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:00,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-03-19 22:00:00,689 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:00,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:00:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:00:00,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:00,874 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 41 treesize of output 35 [2022-03-19 22:00:00,889 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 22:00:00,890 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 93 treesize of output 90 [2022-03-19 22:00:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:00:00,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970399741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:00,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:00,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 12] total 29 [2022-03-19 22:00:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281913564] [2022-03-19 22:00:00,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:00,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-19 22:00:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-19 22:00:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-03-19 22:00:00,971 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:01,991 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2022-03-19 22:00:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 22:00:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-19 22:00:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:01,994 INFO L225 Difference]: With dead ends: 106 [2022-03-19 22:00:01,994 INFO L226 Difference]: Without dead ends: 87 [2022-03-19 22:00:01,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=579, Invalid=2613, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 22:00:01,996 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:01,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 96 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 593 Invalid, 0 Unknown, 143 Unchecked, 0.4s Time] [2022-03-19 22:00:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-19 22:00:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 50. [2022-03-19 22:00:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-03-19 22:00:02,006 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2022-03-19 22:00:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:02,006 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-03-19 22:00:02,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:02,006 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-03-19 22:00:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-19 22:00:02,007 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:02,007 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:02,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:02,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:02,226 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2022-03-19 22:00:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868658724] [2022-03-19 22:00:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:02,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:02,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868658724] [2022-03-19 22:00:02,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868658724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743838012] [2022-03-19 22:00:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:02,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:02,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:02,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:00:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:02,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 22:00:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:03,009 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-19 22:00:03,009 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 39 treesize of output 30 [2022-03-19 22:00:03,262 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-19 22:00:03,262 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 48 treesize of output 31 [2022-03-19 22:00:03,433 INFO L356 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2022-03-19 22:00:03,434 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 38 treesize of output 16 [2022-03-19 22:00:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:00:03,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:06,078 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 69 treesize of output 61 [2022-03-19 22:00:06,087 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-19 22:00:06,087 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 383 treesize of output 347 [2022-03-19 22:00:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:00:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743838012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:08,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 14] total 43 [2022-03-19 22:00:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225596994] [2022-03-19 22:00:08,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:08,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-19 22:00:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-19 22:00:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1603, Unknown=3, NotChecked=0, Total=1806 [2022-03-19 22:00:08,092 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:43,029 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-03-19 22:00:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-19 22:00:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-19 22:00:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:43,033 INFO L225 Difference]: With dead ends: 121 [2022-03-19 22:00:43,033 INFO L226 Difference]: Without dead ends: 119 [2022-03-19 22:00:43,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=604, Invalid=5391, Unknown=11, NotChecked=0, Total=6006 [2022-03-19 22:00:43,041 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 581 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:43,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 192 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 686 Invalid, 0 Unknown, 581 Unchecked, 0.4s Time] [2022-03-19 22:00:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-19 22:00:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 58. [2022-03-19 22:00:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:43,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-03-19 22:00:43,054 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 30 [2022-03-19 22:00:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:43,055 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-03-19 22:00:43,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 40 states have internal predecessors, (63), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:43,058 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-03-19 22:00:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:00:43,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:43,058 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, 1, 1] [2022-03-19 22:00:43,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:00:43,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:43,259 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:43,259 INFO L85 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 3 times [2022-03-19 22:00:43,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592199770] [2022-03-19 22:00:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:43,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:43,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592199770] [2022-03-19 22:00:43,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592199770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955469359] [2022-03-19 22:00:43,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:00:43,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:43,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:43,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:43,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:00:43,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-19 22:00:43,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:00:43,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:43,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:43,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955469359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:43,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:43,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-03-19 22:00:43,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26429719] [2022-03-19 22:00:43,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:43,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 22:00:43,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 22:00:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-19 22:00:43,686 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:43,992 INFO L93 Difference]: Finished difference Result 173 states and 222 transitions. [2022-03-19 22:00:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:00:43,993 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-19 22:00:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:43,994 INFO L225 Difference]: With dead ends: 173 [2022-03-19 22:00:43,994 INFO L226 Difference]: Without dead ends: 130 [2022-03-19 22:00:43,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-19 22:00:43,995 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 191 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:43,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 70 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:00:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-19 22:00:44,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 81. [2022-03-19 22:00:44,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 74 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2022-03-19 22:00:44,006 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 31 [2022-03-19 22:00:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:44,006 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2022-03-19 22:00:44,006 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:00:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2022-03-19 22:00:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 22:00:44,007 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:44,007 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:44,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 22:00:44,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:44,223 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2022-03-19 22:00:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286285131] [2022-03-19 22:00:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:44,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:44,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 22:00:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:44,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:44,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286285131] [2022-03-19 22:00:44,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286285131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:44,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85633147] [2022-03-19 22:00:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:44,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:44,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:44,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:00:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 22:00:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:00:44,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85633147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:44,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:44,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-03-19 22:00:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159027907] [2022-03-19 22:00:44,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:44,692 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:00:44,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:44,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:00:44,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:00:44,693 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:00:45,042 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2022-03-19 22:00:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 22:00:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-19 22:00:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:00:45,043 INFO L225 Difference]: With dead ends: 141 [2022-03-19 22:00:45,043 INFO L226 Difference]: Without dead ends: 122 [2022-03-19 22:00:45,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-03-19 22:00:45,044 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:00:45,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 64 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:00:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-19 22:00:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2022-03-19 22:00:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 91 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2022-03-19 22:00:45,056 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 33 [2022-03-19 22:00:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:00:45,056 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2022-03-19 22:00:45,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:00:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2022-03-19 22:00:45,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 22:00:45,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:00:45,057 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:00:45,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-19 22:00:45,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:45,274 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:00:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:00:45,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 4 times [2022-03-19 22:00:45,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:00:45,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817509586] [2022-03-19 22:00:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:00:45,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:00:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:00:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:00:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:00:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:00:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817509586] [2022-03-19 22:00:45,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817509586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:00:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664368186] [2022-03-19 22:00:45,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:00:45,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:00:45,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:00:45,696 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:00:45,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:00:45,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:00:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:00:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 22:00:45,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:00:45,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:45,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 27 [2022-03-19 22:00:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:00:46,002 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:46,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 29 [2022-03-19 22:00:46,042 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:00:46,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:00:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:46,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:00:48,504 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 57 treesize of output 51 [2022-03-19 22:00:48,529 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-19 22:00:48,529 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 707 treesize of output 673 [2022-03-19 22:00:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:00:49,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664368186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:00:49,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:00:49,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 35 [2022-03-19 22:00:49,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381681080] [2022-03-19 22:00:49,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:00:49,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-19 22:00:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:00:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-19 22:00:49,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1041, Unknown=1, NotChecked=0, Total=1190 [2022-03-19 22:00:49,232 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:01:06,155 WARN L232 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 44 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:01:16,465 WARN L232 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 56 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:01:26,880 WARN L232 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:01:54,024 WARN L232 SmtUtils]: Spent 12.16s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:02:12,512 WARN L232 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:02:23,017 WARN L232 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:02:41,805 WARN L232 SmtUtils]: Spent 10.18s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:02:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:02:41,864 INFO L93 Difference]: Finished difference Result 310 states and 413 transitions. [2022-03-19 22:02:41,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 22:02:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-19 22:02:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:02:41,867 INFO L225 Difference]: With dead ends: 310 [2022-03-19 22:02:41,867 INFO L226 Difference]: Without dead ends: 267 [2022-03-19 22:02:41,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 52 SyntacticMatches, 15 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 114.6s TimeCoverageRelationStatistics Valid=1074, Invalid=8423, Unknown=9, NotChecked=0, Total=9506 [2022-03-19 22:02:41,870 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:02:41,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 149 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 885 Invalid, 0 Unknown, 751 Unchecked, 0.6s Time] [2022-03-19 22:02:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-19 22:02:41,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 137. [2022-03-19 22:02:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.3046875) internal successors, (167), 130 states have internal predecessors, (167), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:02:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 175 transitions. [2022-03-19 22:02:41,887 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 175 transitions. Word has length 33 [2022-03-19 22:02:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:02:41,888 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 175 transitions. [2022-03-19 22:02:41,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 32 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:02:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 175 transitions. [2022-03-19 22:02:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 22:02:41,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:02:41,889 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:02:41,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:02:42,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:02:42,100 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:02:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:02:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1357831320, now seen corresponding path program 2 times [2022-03-19 22:02:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:02:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9256145] [2022-03-19 22:02:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:02:42,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:02:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:02:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 22:02:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:02:42,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9256145] [2022-03-19 22:02:42,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9256145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:02:42,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:02:42,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 22:02:42,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575056938] [2022-03-19 22:02:42,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:02:42,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 22:02:42,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:02:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 22:02:42,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 22:02:42,126 INFO L87 Difference]: Start difference. First operand 137 states and 175 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-19 22:02:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:02:42,173 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2022-03-19 22:02:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 22:02:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 35 [2022-03-19 22:02:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:02:42,174 INFO L225 Difference]: With dead ends: 216 [2022-03-19 22:02:42,174 INFO L226 Difference]: Without dead ends: 90 [2022-03-19 22:02:42,175 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 [2022-03-19 22:02:42,175 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:02:42,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:02:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-19 22:02:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-03-19 22:02:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:02:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2022-03-19 22:02:42,185 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 35 [2022-03-19 22:02:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:02:42,185 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2022-03-19 22:02:42,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-19 22:02:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2022-03-19 22:02:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 22:02:42,186 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:02:42,186 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:02:42,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-19 22:02:42,186 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:02:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:02:42,186 INFO L85 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2022-03-19 22:02:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:02:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294576123] [2022-03-19 22:02:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:02:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:02:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:42,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:02:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 22:02:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:02:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294576123] [2022-03-19 22:02:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294576123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:02:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139594449] [2022-03-19 22:02:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:02:42,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:02:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:02:42,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:02:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:02:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:42,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 22:02:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:02:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:02:42,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 27 [2022-03-19 22:02:42,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:02:42,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:02:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:02:42,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:02:43,005 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 41 treesize of output 35 [2022-03-19 22:02:43,022 INFO L356 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-03-19 22:02:43,023 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 93 treesize of output 90 [2022-03-19 22:02:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:02:43,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139594449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:02:43,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:02:43,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 30 [2022-03-19 22:02:43,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050048222] [2022-03-19 22:02:43,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:02:43,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 22:02:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:02:43,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 22:02:43,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-03-19 22:02:43,185 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:02:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:02:44,620 INFO L93 Difference]: Finished difference Result 191 states and 239 transitions. [2022-03-19 22:02:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 22:02:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 22:02:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:02:44,621 INFO L225 Difference]: With dead ends: 191 [2022-03-19 22:02:44,621 INFO L226 Difference]: Without dead ends: 157 [2022-03-19 22:02:44,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=819, Invalid=3603, Unknown=0, NotChecked=0, Total=4422 [2022-03-19 22:02:44,623 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 230 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:02:44,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 80 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 768 Invalid, 0 Unknown, 83 Unchecked, 0.6s Time] [2022-03-19 22:02:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-19 22:02:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 88. [2022-03-19 22:02:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.275) internal successors, (102), 81 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:02:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-03-19 22:02:44,658 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 38 [2022-03-19 22:02:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:02:44,659 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-03-19 22:02:44,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 27 states have internal predecessors, (72), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:02:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-03-19 22:02:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 22:02:44,660 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:02:44,660 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:02:44,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 22:02:44,867 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,SelfDestructingSolverStorable9 [2022-03-19 22:02:44,867 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:02:44,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:02:44,868 INFO L85 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 3 times [2022-03-19 22:02:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:02:44,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596029603] [2022-03-19 22:02:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:02:44,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:02:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:45,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:02:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:02:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:02:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:02:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596029603] [2022-03-19 22:02:45,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596029603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:02:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700228935] [2022-03-19 22:02:45,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:02:45,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:02:45,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:02:45,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:02:45,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:02:45,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-19 22:02:45,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:02:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 22:02:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:02:45,667 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-19 22:02:45,667 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 39 treesize of output 30 [2022-03-19 22:02:45,887 INFO L356 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2022-03-19 22:02:45,888 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 49 treesize of output 30 [2022-03-19 22:02:46,150 INFO L356 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2022-03-19 22:02:46,151 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 32 treesize of output 34 [2022-03-19 22:02:46,283 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-03-19 22:02:46,284 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 35 treesize of output 13 [2022-03-19 22:02:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:02:46,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:02:56,541 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 85 treesize of output 77 [2022-03-19 22:02:56,562 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-19 22:02:56,562 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 5391 treesize of output 5197 [2022-03-19 22:03:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:03:31,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700228935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:03:31,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:03:31,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 20] total 55 [2022-03-19 22:03:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235345181] [2022-03-19 22:03:31,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:03:31,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-19 22:03:31,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:03:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-19 22:03:31,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2646, Unknown=7, NotChecked=0, Total=2970 [2022-03-19 22:03:31,419 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 55 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 52 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:03:50,652 WARN L232 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 22:04:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:04:32,937 INFO L93 Difference]: Finished difference Result 214 states and 272 transitions. [2022-03-19 22:04:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 22:04:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 52 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-19 22:04:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:04:32,938 INFO L225 Difference]: With dead ends: 214 [2022-03-19 22:04:32,938 INFO L226 Difference]: Without dead ends: 143 [2022-03-19 22:04:32,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 77.7s TimeCoverageRelationStatistics Valid=1008, Invalid=8467, Unknown=31, NotChecked=0, Total=9506 [2022-03-19 22:04:32,940 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 999 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:04:32,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 147 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 733 Invalid, 0 Unknown, 999 Unchecked, 0.4s Time] [2022-03-19 22:04:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-19 22:04:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 93. [2022-03-19 22:04:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 86 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:04:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2022-03-19 22:04:32,950 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 38 [2022-03-19 22:04:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:04:32,950 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2022-03-19 22:04:32,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 52 states have internal predecessors, (83), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:04:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2022-03-19 22:04:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 22:04:32,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:04:32,951 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:04:32,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 22:04:33,155 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:04:33,155 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:04:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:04:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1413015074, now seen corresponding path program 1 times [2022-03-19 22:04:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:04:33,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861419788] [2022-03-19 22:04:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:04:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:04:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:04:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 22:04:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:04:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861419788] [2022-03-19 22:04:33,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861419788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:04:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618693389] [2022-03-19 22:04:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:04:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:04:33,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:04:33,237 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:04:33,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 22:04:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 22:04:33,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:04:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:04:33,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:04:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:04:33,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618693389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:04:33,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:04:33,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2022-03-19 22:04:33,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825948311] [2022-03-19 22:04:33,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:04:33,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 22:04:33,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:04:33,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 22:04:33,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:04:33,460 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:04:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:04:33,935 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2022-03-19 22:04:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 22:04:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-19 22:04:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:04:33,936 INFO L225 Difference]: With dead ends: 195 [2022-03-19 22:04:33,936 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 22:04:33,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 22:04:33,937 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:04:33,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 63 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:04:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 22:04:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 95. [2022-03-19 22:04:33,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 88 states have internal predecessors, (104), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:04:33,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-03-19 22:04:33,947 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 39 [2022-03-19 22:04:33,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:04:33,947 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-03-19 22:04:33,947 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:04:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-03-19 22:04:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 22:04:33,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:04:33,948 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:04:33,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 22:04:34,155 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,SelfDestructingSolverStorable11 [2022-03-19 22:04:34,155 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:04:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:04:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2022-03-19 22:04:34,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:04:34,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446760385] [2022-03-19 22:04:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:04:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:04:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:04:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 22:04:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:04:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:04:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:04:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446760385] [2022-03-19 22:04:34,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446760385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:04:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287739591] [2022-03-19 22:04:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:04:34,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:04:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:04:34,392 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:04:34,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 22:04:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:04:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:04:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 22:04:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:04:34,563 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 16 treesize of output 12 [2022-03-19 22:04:34,641 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-03-19 22:04:34,642 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 23 treesize of output 22 [2022-03-19 22:04:36,673 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ 8 |v_main_~#v~0.offset_BEFORE_CALL_1|))))) is different from true [2022-03-19 22:04:36,734 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 22:04:36,735 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 34 treesize of output 10 [2022-03-19 22:04:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 2 not checked. [2022-03-19 22:04:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:04:39,153 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 67 treesize of output 61 [2022-03-19 22:04:39,190 INFO L356 Elim1Store]: treesize reduction 25, result has 39.0 percent of original size [2022-03-19 22:04:39,191 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 857 treesize of output 802 [2022-03-19 22:04:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:04:39,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287739591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:04:39,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:04:39,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 32 [2022-03-19 22:04:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5475696] [2022-03-19 22:04:39,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:04:39,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 22:04:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:04:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 22:04:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=829, Unknown=1, NotChecked=58, Total=992 [2022-03-19 22:04:39,801 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 22:05:15,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:05:15,008 INFO L93 Difference]: Finished difference Result 153 states and 178 transitions. [2022-03-19 22:05:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 22:05:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-19 22:05:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:05:15,009 INFO L225 Difference]: With dead ends: 153 [2022-03-19 22:05:15,009 INFO L226 Difference]: Without dead ends: 151 [2022-03-19 22:05:15,010 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=349, Invalid=2718, Unknown=17, NotChecked=108, Total=3192 [2022-03-19 22:05:15,010 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 114 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 434 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:05:15,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 187 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 976 Invalid, 0 Unknown, 434 Unchecked, 0.5s Time] [2022-03-19 22:05:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-19 22:05:15,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2022-03-19 22:05:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 113 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:05:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2022-03-19 22:05:15,024 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 41 [2022-03-19 22:05:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:05:15,024 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2022-03-19 22:05:15,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.193548387096774) internal successors, (68), 29 states have internal predecessors, (68), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 22:05:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2022-03-19 22:05:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 22:05:15,025 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:05:15,025 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:05:15,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 22:05:15,228 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,SelfDestructingSolverStorable12 [2022-03-19 22:05:15,228 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:05:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:05:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -866950133, now seen corresponding path program 1 times [2022-03-19 22:05:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:05:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470411502] [2022-03-19 22:05:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:05:15,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:05:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:05:15,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:05:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:05:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:05:15,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:05:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470411502] [2022-03-19 22:05:15,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470411502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:05:15,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485464222] [2022-03-19 22:05:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:05:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:05:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:05:15,406 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:05:15,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 22:05:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:05:15,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-19 22:05:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:05:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 22:05:15,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:05:18,006 WARN L833 $PredicateComparison]: unable to prove that (forall ((aux_div_aux_mod_main_~SIZE~0_29_56 Int) (aux_mod_aux_mod_main_~SIZE~0_29_56 Int)) (or (<= 0 aux_div_aux_mod_main_~SIZE~0_29_56) (< (mod c_main_~j~0 4294967296) (mod (+ (* 4294967295 aux_mod_aux_mod_main_~SIZE~0_29_56) 3) 4294967296)) (<= (+ (* aux_div_aux_mod_main_~SIZE~0_29_56 4294967296) aux_mod_aux_mod_main_~SIZE~0_29_56 4294967293) 0) (<= 4294967296 aux_mod_aux_mod_main_~SIZE~0_29_56))) is different from false [2022-03-19 22:05:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-03-19 22:05:46,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485464222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:05:46,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:05:46,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2022-03-19 22:05:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596453996] [2022-03-19 22:05:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:05:46,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 22:05:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:05:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 22:05:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=298, Unknown=9, NotChecked=36, Total=420 [2022-03-19 22:05:46,318 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:06:04,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:06:04,783 INFO L93 Difference]: Finished difference Result 297 states and 354 transitions. [2022-03-19 22:06:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 22:06:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-19 22:06:04,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:06:04,785 INFO L225 Difference]: With dead ends: 297 [2022-03-19 22:06:04,785 INFO L226 Difference]: Without dead ends: 224 [2022-03-19 22:06:04,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=146, Invalid=597, Unknown=17, NotChecked=52, Total=812 [2022-03-19 22:06:04,786 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 191 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:06:04,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 102 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 448 Invalid, 0 Unknown, 267 Unchecked, 0.3s Time] [2022-03-19 22:06:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-19 22:06:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 157. [2022-03-19 22:06:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 145 states have (on average 1.186206896551724) internal successors, (172), 147 states have internal predecessors, (172), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:06:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2022-03-19 22:06:04,804 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 44 [2022-03-19 22:06:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:06:04,804 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2022-03-19 22:06:04,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 20 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:06:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2022-03-19 22:06:04,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 22:06:04,805 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:06:04,805 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:06:04,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-19 22:06:05,011 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,SelfDestructingSolverStorable13 [2022-03-19 22:06:05,013 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:06:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:06:05,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2022-03-19 22:06:05,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:06:05,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868061949] [2022-03-19 22:06:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:06:05,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:06:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:06:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:05,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 22:06:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:06:05,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:06:05,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868061949] [2022-03-19 22:06:05,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868061949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:06:05,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104802352] [2022-03-19 22:06:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:06:05,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:06:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:06:05,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:06:05,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 22:06:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 22:06:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:06:05,600 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-03-19 22:06:05,601 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 39 treesize of output 30 [2022-03-19 22:06:05,851 INFO L356 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2022-03-19 22:06:05,851 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 48 treesize of output 31 [2022-03-19 22:06:18,027 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-19 22:06:18,028 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 36 treesize of output 12 [2022-03-19 22:06:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:06:18,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:06:37,909 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 71 treesize of output 63 [2022-03-19 22:06:37,927 INFO L356 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2022-03-19 22:06:37,927 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 439 treesize of output 405 [2022-03-19 22:06:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-19 22:06:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104802352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:06:38,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:06:38,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 17] total 42 [2022-03-19 22:06:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036103582] [2022-03-19 22:06:38,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:06:38,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-19 22:06:38,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:06:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-19 22:06:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1507, Unknown=16, NotChecked=0, Total=1722 [2022-03-19 22:06:38,304 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 22:06:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:06:44,161 INFO L93 Difference]: Finished difference Result 255 states and 301 transitions. [2022-03-19 22:06:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 22:06:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-03-19 22:06:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:06:44,163 INFO L225 Difference]: With dead ends: 255 [2022-03-19 22:06:44,163 INFO L226 Difference]: Without dead ends: 253 [2022-03-19 22:06:44,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 80 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=643, Invalid=4741, Unknown=18, NotChecked=0, Total=5402 [2022-03-19 22:06:44,165 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 253 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 22:06:44,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 233 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1495 Invalid, 0 Unknown, 674 Unchecked, 0.9s Time] [2022-03-19 22:06:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-19 22:06:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 161. [2022-03-19 22:06:44,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.1879194630872483) internal successors, (177), 151 states have internal predecessors, (177), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:06:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 188 transitions. [2022-03-19 22:06:44,188 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 188 transitions. Word has length 46 [2022-03-19 22:06:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:06:44,188 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 188 transitions. [2022-03-19 22:06:44,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.1) internal successors, (84), 39 states have internal predecessors, (84), 5 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-19 22:06:44,189 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 188 transitions. [2022-03-19 22:06:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 22:06:44,189 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:06:44,189 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:06:44,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 22:06:44,403 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,SelfDestructingSolverStorable14 [2022-03-19 22:06:44,403 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:06:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:06:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1458084557, now seen corresponding path program 2 times [2022-03-19 22:06:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:06:44,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615943318] [2022-03-19 22:06:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:06:44,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:06:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:45,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:06:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:06:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:06:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:06:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615943318] [2022-03-19 22:06:45,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615943318] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:06:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551973944] [2022-03-19 22:06:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:06:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:06:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:06:45,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:06:45,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 22:06:45,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:06:45,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:06:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 22:06:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:06:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 27 [2022-03-19 22:06:45,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:06:45,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 32 [2022-03-19 22:06:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:06:45,576 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:06:45,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 32 [2022-03-19 22:06:45,612 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:06:45,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-03-19 22:06:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-19 22:06:45,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:06:47,761 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_46 Int)) (or (not (<= c_main_~i~0 (+ v_main_~i~0_46 1))) (forall ((v_ArrVal_357 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_46 4) 4) v_ArrVal_357))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-03-19 22:06:52,649 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_48 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_48 1))) (forall ((v_ArrVal_357 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_48 4) 4) v_ArrVal_357))) (<= (select .cse0 |c_main_~#v~0.offset|) (select .cse0 (+ |c_main_~#v~0.offset| 4))))))) is different from false [2022-03-19 22:07:00,608 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 57 treesize of output 51 [2022-03-19 22:07:00,630 INFO L356 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2022-03-19 22:07:00,630 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 761 treesize of output 727 [2022-03-19 22:07:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 3 not checked. [2022-03-19 22:07:08,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551973944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:07:08,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:07:08,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 16] total 44 [2022-03-19 22:07:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211911249] [2022-03-19 22:07:08,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:07:08,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-19 22:07:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:07:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-19 22:07:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1482, Unknown=11, NotChecked=162, Total=1892 [2022-03-19 22:07:08,831 INFO L87 Difference]: Start difference. First operand 161 states and 188 transitions. Second operand has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:07:11,315 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_main_~#v~0.base|))) (let ((.cse0 (select .cse1 0)) (.cse3 (and (< 0 c_main_~j~0) (= (* c_main_~i~0 4) 0)))) (and (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| (- 4) (* c_main_~j~0 4)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (forall ((v_main_~i~0_48 Int)) (or (not (<= c_main_~j~0 (+ v_main_~i~0_48 1))) (forall ((v_ArrVal_357 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_48 4) 4) v_ArrVal_357))) (<= (select .cse2 |c_main_~#v~0.offset|) (select .cse2 (+ |c_main_~#v~0.offset| 4))))))) (<= (+ 2 (div (* (- 1) |c_main_~#v~0.offset|) 4)) c_main_~j~0) (<= c_main_~j~0 2) (<= .cse0 (select .cse1 (+ |c_main_~#v~0.offset| 4))) (or (not (<= 0 c_main_~i~0)) .cse3) (<= c_main_~i~0 2) (or .cse3 (not |c_main_#t~short10|)) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)))) is different from false [2022-03-19 22:07:14,046 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 c_main_~i~0) (let ((.cse0 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (select .cse0 0) (select .cse0 (+ |c_main_~#v~0.offset| 4)))) (<= c_main_~i~0 2) (<= c_main_~j~0 3) (forall ((v_main_~i~0_46 Int)) (or (not (<= c_main_~i~0 (+ v_main_~i~0_46 1))) (forall ((v_ArrVal_357 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_46 4) 4) v_ArrVal_357))) (<= (select .cse1 |c_main_~#v~0.offset|) (select .cse1 (+ |c_main_~#v~0.offset| 4))))))) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-19 22:07:16,259 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 c_main_~i~0) (let ((.cse0 (select |c_#memory_int| |c_main_~#v~0.base|))) (<= (select .cse0 0) (select .cse0 (+ |c_main_~#v~0.offset| 4)))) (forall ((v_main_~i~0_46 Int)) (or (not (<= c_main_~i~0 (+ v_main_~i~0_46 1))) (forall ((v_ArrVal_357 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_main_~#v~0.base|) (+ |c_main_~#v~0.offset| (* v_main_~i~0_46 4) 4) v_ArrVal_357))) (<= (select .cse1 |c_main_~#v~0.offset|) (select .cse1 (+ |c_main_~#v~0.offset| 4))))))) (= |c_main_~#v~0.offset| 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-19 22:07:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:07:16,550 INFO L93 Difference]: Finished difference Result 292 states and 344 transitions. [2022-03-19 22:07:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 22:07:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-19 22:07:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:07:16,552 INFO L225 Difference]: With dead ends: 292 [2022-03-19 22:07:16,552 INFO L226 Difference]: Without dead ends: 290 [2022-03-19 22:07:16,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=705, Invalid=4703, Unknown=14, NotChecked=740, Total=6162 [2022-03-19 22:07:16,554 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 213 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:07:16,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 129 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1118 Invalid, 0 Unknown, 451 Unchecked, 0.7s Time] [2022-03-19 22:07:16,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-19 22:07:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 173. [2022-03-19 22:07:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.1987577639751552) internal successors, (193), 163 states have internal predecessors, (193), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:07:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2022-03-19 22:07:16,576 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 46 [2022-03-19 22:07:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:07:16,576 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2022-03-19 22:07:16,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.0930232558139537) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:07:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2022-03-19 22:07:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 22:07:16,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:07:16,577 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:07:16,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 22:07:16,777 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:07:16,777 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:07:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:07:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash -564916451, now seen corresponding path program 4 times [2022-03-19 22:07:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:07:16,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521802723] [2022-03-19 22:07:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:07:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:07:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:07:17,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:07:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:07:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:07:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:07:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521802723] [2022-03-19 22:07:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521802723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:07:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794379776] [2022-03-19 22:07:17,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:07:17,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:07:17,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:07:17,497 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:07:17,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 22:07:17,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:07:17,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:07:17,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-19 22:07:17,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:07:17,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:17,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 30 [2022-03-19 22:07:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,009 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:07:18,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2022-03-19 22:07:18,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:07:18,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 31 [2022-03-19 22:07:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-19 22:07:18,281 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:07:18,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 34 [2022-03-19 22:07:18,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-19 22:07:18,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2022-03-19 22:07:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 22:07:18,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:08:59,844 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 99 treesize of output 91 [2022-03-19 22:08:59,875 INFO L356 Elim1Store]: treesize reduction 27, result has 27.0 percent of original size [2022-03-19 22:08:59,876 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 177275 treesize of output 174201 [2022-03-19 22:09:06,459 WARN L232 SmtUtils]: Spent 6.58s on a formula simplification. DAG size of input: 420 DAG size of output: 416 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)