/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/bresenham-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:33:49,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:33:49,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:33:49,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 13:33:49,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 13:33:49,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 13:33:49,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 13:33:49,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 13:33:49,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 13:33:49,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 13:33:49,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 13:33:49,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 13:33:49,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 13:33:49,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 13:33:49,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 13:33:49,980 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 13:33:49,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 13:33:49,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 13:33:49,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 13:33:49,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 13:33:49,987 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 13:33:49,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 13:33:49,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 13:33:49,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 13:33:49,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 13:33:49,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 13:33:50,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:33:50,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:33:50,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:33:50,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:33:50,011 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:33:50,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:33:50,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:33:50,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:33:50,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:33:50,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:33:50,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:33:50,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:33:50,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:33:50,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:33:50,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:33:50,016 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:33:50,017 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:33:50,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:33:50,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:33:50,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:33:50,190 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:33:50,193 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:33:50,194 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/bresenham-ll.c [2022-03-20 13:33:50,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d9f8754/5740e28b58a249388eb7716a3b630406/FLAGbb5d37694 [2022-03-20 13:33:50,600 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:33:50,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham-ll.c [2022-03-20 13:33:50,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d9f8754/5740e28b58a249388eb7716a3b630406/FLAGbb5d37694 [2022-03-20 13:33:50,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d9f8754/5740e28b58a249388eb7716a3b630406 [2022-03-20 13:33:50,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:33:50,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:33:50,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:33:50,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:33:50,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:33:50,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f50cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50, skipping insertion in model container [2022-03-20 13:33:50,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:33:50,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:33:50,738 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham-ll.c[597,610] [2022-03-20 13:33:50,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:33:50,771 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:33:50,779 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/bresenham-ll.c[597,610] [2022-03-20 13:33:50,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:33:50,790 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:33:50,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50 WrapperNode [2022-03-20 13:33:50,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:33:50,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:33:50,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:33:50,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:33:50,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:33:50,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:33:50,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:33:50,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:33:50,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (1/1) ... [2022-03-20 13:33:50,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:33:50,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:50,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:33:50,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:33:50,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:33:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:33:50,866 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:33:50,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:33:50,906 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:33:50,908 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:33:50,991 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:33:50,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:33:50,995 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:33:50,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:33:50 BoogieIcfgContainer [2022-03-20 13:33:50,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:33:50,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:33:50,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:33:50,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:33:51,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:33:50" (1/3) ... [2022-03-20 13:33:51,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730f2556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:33:51, skipping insertion in model container [2022-03-20 13:33:51,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:33:50" (2/3) ... [2022-03-20 13:33:51,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730f2556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:33:51, skipping insertion in model container [2022-03-20 13:33:51,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:33:50" (3/3) ... [2022-03-20 13:33:51,001 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2022-03-20 13:33:51,004 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:33:51,004 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:33:51,030 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:33:51,034 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:33:51,034 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:33:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:33:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:33:51,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:51,048 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:51,049 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2052809213, now seen corresponding path program 1 times [2022-03-20 13:33:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:51,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141915241] [2022-03-20 13:33:51,064 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:33:51,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2052809213, now seen corresponding path program 2 times [2022-03-20 13:33:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:51,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047395924] [2022-03-20 13:33:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:51,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:51,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905376672] [2022-03-20 13:33:51,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:51,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:51,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:51,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:33:51,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:33:51,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 13:33:51,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:51,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 13:33:51,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:51,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 13:33:51,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:51,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047395924] [2022-03-20 13:33:51,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905376672] [2022-03-20 13:33:51,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905376672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:51,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:51,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:33:51,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:51,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141915241] [2022-03-20 13:33:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141915241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:51,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:51,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 13:33:51,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335261206] [2022-03-20 13:33:51,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:51,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 13:33:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:51,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 13:33:51,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 13:33:51,375 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-03-20 13:33:51,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:51,513 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2022-03-20 13:33:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 13:33:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 11 [2022-03-20 13:33:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:51,531 INFO L225 Difference]: With dead ends: 55 [2022-03-20 13:33:51,532 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 13:33:51,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 13:33:51,537 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:51,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:33:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 13:33:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 13:33:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:33:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-20 13:33:51,569 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2022-03-20 13:33:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:51,570 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-20 13:33:51,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-03-20 13:33:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-20 13:33:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:33:51,571 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:51,571 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:51,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 13:33:51,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 13:33:51,799 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:51,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash 327600201, now seen corresponding path program 1 times [2022-03-20 13:33:51,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:51,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1920995880] [2022-03-20 13:33:51,818 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:51,819 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:33:51,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:33:51,819 INFO L85 PathProgramCache]: Analyzing trace with hash 327600201, now seen corresponding path program 2 times [2022-03-20 13:33:51,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365593694] [2022-03-20 13:33:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:51,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106596109] [2022-03-20 13:33:51,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:51,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:51,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:51,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:33:51,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:33:51,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:51,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:51,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 13:33:51,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:52,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:52,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365593694] [2022-03-20 13:33:52,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106596109] [2022-03-20 13:33:52,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106596109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:52,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:52,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 13:33:52,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:52,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1920995880] [2022-03-20 13:33:52,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1920995880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:52,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:52,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:33:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519985977] [2022-03-20 13:33:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:52,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:33:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:33:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:33:52,138 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:52,211 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-20 13:33:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:33:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:33:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:52,212 INFO L225 Difference]: With dead ends: 40 [2022-03-20 13:33:52,212 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 13:33:52,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:33:52,214 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:52,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:33:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 13:33:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 13:33:52,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:33:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 13:33:52,220 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2022-03-20 13:33:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:52,220 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 13:33:52,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:52,221 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 13:33:52,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 13:33:52,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:52,221 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:52,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 13:33:52,456 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,SelfDestructingSolverStorable1 [2022-03-20 13:33:52,456 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2102607563, now seen corresponding path program 1 times [2022-03-20 13:33:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919444813] [2022-03-20 13:33:52,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:52,461 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:33:52,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:33:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2102607563, now seen corresponding path program 2 times [2022-03-20 13:33:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:52,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551148927] [2022-03-20 13:33:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:52,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748995261] [2022-03-20 13:33:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:52,474 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:33:52,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:33:52,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 13:33:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:33:52,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551148927] [2022-03-20 13:33:52,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748995261] [2022-03-20 13:33:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748995261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:52,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:52,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-20 13:33:52,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:52,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919444813] [2022-03-20 13:33:52,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919444813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:52,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:52,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 13:33:52,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984470188] [2022-03-20 13:33:52,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:52,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 13:33:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:52,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 13:33:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 13:33:52,710 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:52,797 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-20 13:33:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:33:52,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-03-20 13:33:52,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:52,799 INFO L225 Difference]: With dead ends: 48 [2022-03-20 13:33:52,799 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:33:52,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 13:33:52,800 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:52,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:33:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:33:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-03-20 13:33:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 13:33:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-20 13:33:52,808 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 20 [2022-03-20 13:33:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:52,808 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-20 13:33:52,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 13:33:52,808 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-20 13:33:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 13:33:52,809 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:52,809 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:52,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:33:53,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:53,010 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash 890152080, now seen corresponding path program 1 times [2022-03-20 13:33:53,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:53,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1230710456] [2022-03-20 13:33:53,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:53,014 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:33:53,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:33:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash 890152080, now seen corresponding path program 2 times [2022-03-20 13:33:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:53,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239984580] [2022-03-20 13:33:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:53,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:53,021 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837367963] [2022-03-20 13:33:53,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:33:53,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:53,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:33:53,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:33:53,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:33:53,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:53,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 13:33:53,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:53,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 13:33:53,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:53,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239984580] [2022-03-20 13:33:53,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:53,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837367963] [2022-03-20 13:33:53,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837367963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:53,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:53,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-20 13:33:53,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:53,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1230710456] [2022-03-20 13:33:53,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1230710456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:53,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:53,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:33:53,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952813753] [2022-03-20 13:33:53,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:53,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:33:53,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:53,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:33:53,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:33:53,675 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:33:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:33:53,881 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2022-03-20 13:33:53,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:33:53,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-03-20 13:33:53,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:33:53,882 INFO L225 Difference]: With dead ends: 53 [2022-03-20 13:33:53,882 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 13:33:53,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:33:53,883 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:33:53,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:33:53,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 13:33:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-03-20 13:33:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:33:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 13:33:53,889 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2022-03-20 13:33:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:33:53,889 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 13:33:53,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:33:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 13:33:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:33:53,890 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:33:53,890 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:33:53,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:33:54,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:54,108 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:33:54,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:33:54,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1671149437, now seen corresponding path program 3 times [2022-03-20 13:33:54,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:54,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806898486] [2022-03-20 13:33:54,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:33:54,111 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:33:54,111 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:33:54,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1671149437, now seen corresponding path program 4 times [2022-03-20 13:33:54,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:33:54,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343838974] [2022-03-20 13:33:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:33:54,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:33:54,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:33:54,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189914334] [2022-03-20 13:33:54,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:33:54,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:33:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:33:54,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:33:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:33:54,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:33:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:33:54,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 13:33:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:33:54,290 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:33:54,293 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:33:54,299 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:33:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 13:33:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:33:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 13:33:59,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:33:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343838974] [2022-03-20 13:33:59,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:33:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189914334] [2022-03-20 13:33:59,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189914334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:33:59,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:33:59,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2022-03-20 13:33:59,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:33:59,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806898486] [2022-03-20 13:33:59,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806898486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:33:59,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:33:59,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:33:59,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430963104] [2022-03-20 13:33:59,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:33:59,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:33:59,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:33:59,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:33:59,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=144, Unknown=2, NotChecked=0, Total=182 [2022-03-20 13:33:59,237 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:27,618 WARN L232 SmtUtils]: Spent 28.34s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 13:34:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:27,684 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-03-20 13:34:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:34:27,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-03-20 13:34:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:27,685 INFO L225 Difference]: With dead ends: 41 [2022-03-20 13:34:27,685 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 13:34:27,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=57, Invalid=213, Unknown=2, NotChecked=0, Total=272 [2022-03-20 13:34:27,686 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:27,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 80 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-03-20 13:34:27,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 13:34:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 13:34:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:34:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-20 13:34:27,694 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 29 [2022-03-20 13:34:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:27,694 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-20 13:34:27,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.875) internal successors, (15), 10 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-20 13:34:27,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:34:27,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:27,695 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:27,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:34:27,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:27,896 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -178233442, now seen corresponding path program 1 times [2022-03-20 13:34:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:27,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286062667] [2022-03-20 13:34:27,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:27,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:34:27,899 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:34:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -178233442, now seen corresponding path program 2 times [2022-03-20 13:34:27,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:27,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849234707] [2022-03-20 13:34:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:27,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:27,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512165886] [2022-03-20 13:34:27,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:34:27,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:27,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:27,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:34:27,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:34:27,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:34:27,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:34:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 13:34:27,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:28,041 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:34:28,043 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:34:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 13:34:28,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-20 13:34:28,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849234707] [2022-03-20 13:34:28,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512165886] [2022-03-20 13:34:28,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512165886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:28,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:28,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-03-20 13:34:28,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286062667] [2022-03-20 13:34:28,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286062667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:28,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:28,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:34:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295713663] [2022-03-20 13:34:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:28,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:34:28,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:34:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 13:34:28,628 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:30,636 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:34,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:36,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:38,730 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:40,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:42,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 13:34:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:44,865 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-20 13:34:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:34:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-03-20 13:34:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:44,867 INFO L225 Difference]: With dead ends: 52 [2022-03-20 13:34:44,867 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 13:34:44,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-03-20 13:34:44,867 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:44,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 47 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 6 Unknown, 0 Unchecked, 12.1s Time] [2022-03-20 13:34:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 13:34:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 13:34:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 13:34:44,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-03-20 13:34:44,878 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 36 [2022-03-20 13:34:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:44,879 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-03-20 13:34:44,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:34:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-03-20 13:34:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:34:44,882 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:44,882 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:44,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 13:34:45,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:45,098 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1189350692, now seen corresponding path program 1 times [2022-03-20 13:34:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:45,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408005417] [2022-03-20 13:34:45,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:45,103 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:34:45,103 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:34:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1189350692, now seen corresponding path program 2 times [2022-03-20 13:34:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:45,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30298153] [2022-03-20 13:34:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:45,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:45,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025419900] [2022-03-20 13:34:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:34:45,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:45,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:45,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:34:45,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:34:45,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:34:45,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:34:45,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 13:34:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:34:45,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:34:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 13:34:45,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:34:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30298153] [2022-03-20 13:34:45,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 13:34:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025419900] [2022-03-20 13:34:45,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025419900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:34:45,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 13:34:45,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 13:34:45,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:34:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408005417] [2022-03-20 13:34:45,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408005417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:34:45,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:34:45,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 13:34:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669536825] [2022-03-20 13:34:45,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:34:45,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 13:34:45,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:45,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 13:34:45,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:34:45,421 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:34:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:34:45,488 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-03-20 13:34:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 13:34:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-03-20 13:34:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:34:45,492 INFO L225 Difference]: With dead ends: 59 [2022-03-20 13:34:45,492 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 13:34:45,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 13:34:45,493 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:34:45,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:34:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 13:34:45,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2022-03-20 13:34:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 13:34:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-03-20 13:34:45,519 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 36 [2022-03-20 13:34:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:34:45,520 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-03-20 13:34:45,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 13:34:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-03-20 13:34:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 13:34:45,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:34:45,525 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:34:45,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:34:45,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:45,751 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:34:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:34:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1983671776, now seen corresponding path program 3 times [2022-03-20 13:34:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:34:45,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [857760724] [2022-03-20 13:34:45,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:34:45,755 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-20 13:34:45,755 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:34:45,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1983671776, now seen corresponding path program 4 times [2022-03-20 13:34:45,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:34:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618565167] [2022-03-20 13:34:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:34:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:34:45,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 13:34:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113155925] [2022-03-20 13:34:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:34:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:34:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:34:45,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:34:45,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:34:46,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:34:46,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:34:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 13:34:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:34:46,419 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:34:46,422 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:34:46,428 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 13:34:50,495 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false