/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 01:29:05,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 01:29:05,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 01:29:05,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 01:29:05,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 01:29:05,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 01:29:05,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 01:29:05,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 01:29:05,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 01:29:05,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 01:29:05,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 01:29:05,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 01:29:05,107 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 01:29:05,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 01:29:05,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 01:29:05,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 01:29:05,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 01:29:05,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 01:29:05,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 01:29:05,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 01:29:05,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 01:29:05,127 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 01:29:05,139 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 01:29:05,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 01:29:05,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 01:29:05,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 01:29:05,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 01:29:05,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 01:29:05,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 01:29:05,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 01:29:05,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 01:29:05,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:29:05,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 01:29:05,142 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 01:29:05,142 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 01:29:05,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 01:29:05,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 01:29:05,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 01:29:05,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 01:29:05,398 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 01:29:05,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-04-05 01:29:05,442 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a2320f/11f5be1d72c743879aa015d188ff54ef/FLAG2291c00ee [2022-04-05 01:29:05,755 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 01:29:05,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin-ll.c [2022-04-05 01:29:05,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a2320f/11f5be1d72c743879aa015d188ff54ef/FLAG2291c00ee [2022-04-05 01:29:06,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999a2320f/11f5be1d72c743879aa015d188ff54ef [2022-04-05 01:29:06,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 01:29:06,198 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 01:29:06,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 01:29:06,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 01:29:06,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 01:29:06,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d439904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06, skipping insertion in model container [2022-04-05 01:29:06,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 01:29:06,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 01:29:06,394 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/prodbin-ll.c[537,550] [2022-04-05 01:29:06,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:29:06,446 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 01:29:06,455 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/prodbin-ll.c[537,550] [2022-04-05 01:29:06,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 01:29:06,467 INFO L208 MainTranslator]: Completed translation [2022-04-05 01:29:06,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06 WrapperNode [2022-04-05 01:29:06,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 01:29:06,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 01:29:06,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 01:29:06,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 01:29:06,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 01:29:06,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 01:29:06,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 01:29:06,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 01:29:06,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 01:29:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:06,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 01:29:06,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 01:29:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 01:29:06,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 01:29:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 01:29:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 01:29:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 01:29:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 01:29:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 01:29:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 01:29:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 01:29:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 01:29:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 01:29:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 01:29:06,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 01:29:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 01:29:06,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 01:29:06,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 01:29:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 01:29:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 01:29:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 01:29:06,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 01:29:06,629 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 01:29:06,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 01:29:06,749 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 01:29:06,753 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 01:29:06,753 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 01:29:06,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:29:06 BoogieIcfgContainer [2022-04-05 01:29:06,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 01:29:06,755 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 01:29:06,755 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 01:29:06,759 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 01:29:06,761 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:29:06" (1/1) ... [2022-04-05 01:29:06,763 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 01:29:06,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:29:06 BasicIcfg [2022-04-05 01:29:06,775 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 01:29:06,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 01:29:06,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 01:29:06,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 01:29:06,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 01:29:06" (1/4) ... [2022-04-05 01:29:06,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c270fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:29:06, skipping insertion in model container [2022-04-05 01:29:06,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 01:29:06" (2/4) ... [2022-04-05 01:29:06,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c270fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 01:29:06, skipping insertion in model container [2022-04-05 01:29:06,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 01:29:06" (3/4) ... [2022-04-05 01:29:06,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c270fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 01:29:06, skipping insertion in model container [2022-04-05 01:29:06,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 01:29:06" (4/4) ... [2022-04-05 01:29:06,793 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll.cJordan [2022-04-05 01:29:06,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 01:29:06,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 01:29:06,824 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 01:29:06,829 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 01:29:06,829 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 01:29:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 01:29:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 01:29:06,842 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:06,842 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:06,843 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -771267128, now seen corresponding path program 1 times [2022-04-05 01:29:06,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:06,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257420838] [2022-04-05 01:29:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:06,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 01:29:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:06,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 01:29:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:07,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:07,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257420838] [2022-04-05 01:29:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257420838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:29:07,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:29:07,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 01:29:07,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932374346] [2022-04-05 01:29:07,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:29:07,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 01:29:07,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:07,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 01:29:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:29:07,033 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:29:07,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:07,069 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-05 01:29:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 01:29:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 01:29:07,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:07,077 INFO L225 Difference]: With dead ends: 29 [2022-04-05 01:29:07,077 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 01:29:07,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 01:29:07,081 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:07,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:29:07,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 01:29:07,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-05 01:29:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 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) [2022-04-05 01:29:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-04-05 01:29:07,110 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2022-04-05 01:29:07,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:07,110 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-04-05 01:29:07,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:29:07,111 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-04-05 01:29:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 01:29:07,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:07,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:07,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 01:29:07,112 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:07,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:07,113 INFO L85 PathProgramCache]: Analyzing trace with hash -769390295, now seen corresponding path program 1 times [2022-04-05 01:29:07,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:07,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529217822] [2022-04-05 01:29:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:07,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:07,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:07,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957442538] [2022-04-05 01:29:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:07,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:07,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:07,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 01:29:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 01:29:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:07,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:29:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:07,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529217822] [2022-04-05 01:29:07,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:07,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957442538] [2022-04-05 01:29:07,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957442538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:29:07,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:29:07,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 01:29:07,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31806816] [2022-04-05 01:29:07,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:29:07,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 01:29:07,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 01:29:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 01:29:07,334 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:29:07,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:07,388 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-05 01:29:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 01:29:07,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-05 01:29:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:07,392 INFO L225 Difference]: With dead ends: 34 [2022-04-05 01:29:07,394 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 01:29:07,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:29:07,398 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:07,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:29:07,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 01:29:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2022-04-05 01:29:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 01:29:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-05 01:29:07,403 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-04-05 01:29:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:07,403 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-05 01:29:07,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-05 01:29:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-05 01:29:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 01:29:07,404 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:07,404 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:07,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-05 01:29:07,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:07,609 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1186133628, now seen corresponding path program 1 times [2022-04-05 01:29:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:07,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537679351] [2022-04-05 01:29:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:07,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:07,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:07,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349344313] [2022-04-05 01:29:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:07,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:07,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:07,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 01:29:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 01:29:07,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:07,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 01:29:07,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537679351] [2022-04-05 01:29:07,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:07,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349344313] [2022-04-05 01:29:07,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349344313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 01:29:07,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 01:29:07,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 01:29:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318492007] [2022-04-05 01:29:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 01:29:07,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 01:29:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:07,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 01:29:07,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 01:29:07,745 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:29:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:07,786 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-04-05 01:29:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 01:29:07,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-05 01:29:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:07,788 INFO L225 Difference]: With dead ends: 33 [2022-04-05 01:29:07,788 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 01:29:07,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 01:29:07,789 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:07,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 80 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 01:29:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 01:29:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-04-05 01:29:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-05 01:29:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-05 01:29:07,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2022-04-05 01:29:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:07,793 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-05 01:29:07,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-05 01:29:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-05 01:29:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 01:29:07,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:07,794 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:07,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 01:29:08,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 01:29:08,008 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:08,009 INFO L85 PathProgramCache]: Analyzing trace with hash 921463763, now seen corresponding path program 1 times [2022-04-05 01:29:08,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:08,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138887226] [2022-04-05 01:29:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:08,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:08,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:08,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44106373] [2022-04-05 01:29:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:08,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:08,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:08,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:08,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 01:29:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:08,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 01:29:08,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:29:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:17,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138887226] [2022-04-05 01:29:17,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44106373] [2022-04-05 01:29:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44106373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:29:17,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:29:17,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-05 01:29:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296593705] [2022-04-05 01:29:17,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:29:17,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 01:29:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 01:29:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=142, Unknown=2, NotChecked=0, Total=182 [2022-04-05 01:29:17,931 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:29:22,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:29:25,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:29:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:25,347 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-04-05 01:29:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 01:29:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-04-05 01:29:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:25,349 INFO L225 Difference]: With dead ends: 47 [2022-04-05 01:29:25,349 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 01:29:25,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=70, Invalid=270, Unknown=2, NotChecked=0, Total=342 [2022-04-05 01:29:25,350 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:25,350 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 117 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-05 01:29:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 01:29:25,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-04-05 01:29:25,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 01:29:25,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-04-05 01:29:25,355 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2022-04-05 01:29:25,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:25,355 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-04-05 01:29:25,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 01:29:25,355 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-04-05 01:29:25,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 01:29:25,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:25,356 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:25,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 01:29:25,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:25,571 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:25,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1808967444, now seen corresponding path program 1 times [2022-04-05 01:29:25,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229442008] [2022-04-05 01:29:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:25,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:25,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:25,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453053263] [2022-04-05 01:29:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:25,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:25,583 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 01:29:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:25,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 01:29:25,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:27,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:29:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 01:29:28,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229442008] [2022-04-05 01:29:28,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453053263] [2022-04-05 01:29:28,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453053263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:29:28,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:29:28,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-05 01:29:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785123697] [2022-04-05 01:29:28,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:29:28,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 01:29:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 01:29:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-05 01:29:28,014 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:29:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:28,908 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-04-05 01:29:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 01:29:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2022-04-05 01:29:28,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:28,910 INFO L225 Difference]: With dead ends: 73 [2022-04-05 01:29:28,910 INFO L226 Difference]: Without dead ends: 73 [2022-04-05 01:29:28,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-04-05 01:29:28,912 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:28,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 01:29:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-05 01:29:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-04-05 01:29:28,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 53 states have internal predecessors, (61), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 01:29:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-04-05 01:29:28,918 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 26 [2022-04-05 01:29:28,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:28,918 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-04-05 01:29:28,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:29:28,918 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-04-05 01:29:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 01:29:28,918 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:28,919 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, 1, 1, 1, 1, 1] [2022-04-05 01:29:28,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 01:29:29,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:29,135 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1415101266, now seen corresponding path program 1 times [2022-04-05 01:29:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:29,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395291628] [2022-04-05 01:29:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:29,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:29,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059770874] [2022-04-05 01:29:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:29,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:29,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:29,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:29,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 01:29:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:29,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 01:29:29,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 01:29:29,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:29:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 01:29:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395291628] [2022-04-05 01:29:29,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:29,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059770874] [2022-04-05 01:29:29,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059770874] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:29:29,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:29:29,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-05 01:29:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651488858] [2022-04-05 01:29:29,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:29:29,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 01:29:29,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:29,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 01:29:29,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 01:29:29,355 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 01:29:31,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:29:33,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:29:33,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:33,418 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2022-04-05 01:29:33,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 01:29:33,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2022-04-05 01:29:33,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:33,420 INFO L225 Difference]: With dead ends: 75 [2022-04-05 01:29:33,421 INFO L226 Difference]: Without dead ends: 70 [2022-04-05 01:29:33,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-05 01:29:33,421 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:33,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 95 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 2 Unknown, 0 Unchecked, 4.0s Time] [2022-04-05 01:29:33,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-05 01:29:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-05 01:29:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.14) internal successors, (57), 52 states have internal predecessors, (57), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 01:29:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-04-05 01:29:33,434 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 32 [2022-04-05 01:29:33,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:33,435 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-04-05 01:29:33,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 01:29:33,435 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-04-05 01:29:33,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 01:29:33,436 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:33,436 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:33,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 01:29:33,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:33,671 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:33,672 INFO L85 PathProgramCache]: Analyzing trace with hash -847876140, now seen corresponding path program 1 times [2022-04-05 01:29:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:33,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568650006] [2022-04-05 01:29:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:33,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:33,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:33,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776639434] [2022-04-05 01:29:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:33,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:33,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:33,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:33,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 01:29:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 01:29:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 01:29:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:34,198 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 01:29:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 01:29:37,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:29:40,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:29:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568650006] [2022-04-05 01:29:40,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:29:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776639434] [2022-04-05 01:29:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776639434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:29:40,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:29:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-05 01:29:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036233510] [2022-04-05 01:29:40,425 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:29:40,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 01:29:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:29:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 01:29:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=318, Unknown=2, NotChecked=0, Total=380 [2022-04-05 01:29:40,426 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 01:29:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:29:40,772 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-04-05 01:29:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 01:29:40,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-04-05 01:29:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:29:40,776 INFO L225 Difference]: With dead ends: 89 [2022-04-05 01:29:40,776 INFO L226 Difference]: Without dead ends: 89 [2022-04-05 01:29:40,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=71, Invalid=389, Unknown=2, NotChecked=0, Total=462 [2022-04-05 01:29:40,777 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:29:40,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 195 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 214 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-04-05 01:29:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-05 01:29:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2022-04-05 01:29:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 62 states have internal predecessors, (67), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 01:29:40,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-04-05 01:29:40,782 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 44 [2022-04-05 01:29:40,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:29:40,783 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-04-05 01:29:40,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 01:29:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-04-05 01:29:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 01:29:40,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:29:40,788 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:29:40,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 01:29:41,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:41,002 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:29:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:29:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1358410317, now seen corresponding path program 2 times [2022-04-05 01:29:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:29:41,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169926402] [2022-04-05 01:29:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:29:41,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:29:41,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:29:41,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713980147] [2022-04-05 01:29:41,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:29:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:29:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:29:41,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:29:41,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 01:29:41,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:29:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:29:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-05 01:29:41,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:29:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 01:29:56,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:30:03,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:30:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169926402] [2022-04-05 01:30:03,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:30:03,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713980147] [2022-04-05 01:30:03,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713980147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:30:03,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:30:03,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-05 01:30:03,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228815154] [2022-04-05 01:30:03,762 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:30:03,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 01:30:03,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:30:03,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 01:30:03,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=409, Unknown=1, NotChecked=0, Total=506 [2022-04-05 01:30:03,763 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 01:30:05,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:30:07,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:30:08,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:30:12,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 01:30:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:30:12,653 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2022-04-05 01:30:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 01:30:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2022-04-05 01:30:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:30:12,655 INFO L225 Difference]: With dead ends: 104 [2022-04-05 01:30:12,655 INFO L226 Difference]: Without dead ends: 104 [2022-04-05 01:30:12,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=113, Invalid=536, Unknown=1, NotChecked=0, Total=650 [2022-04-05 01:30:12,656 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-04-05 01:30:12,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 129 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-04-05 01:30:12,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-05 01:30:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-04-05 01:30:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 01:30:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-04-05 01:30:12,662 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 44 [2022-04-05 01:30:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:30:12,662 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-04-05 01:30:12,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 01:30:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-04-05 01:30:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 01:30:12,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:30:12,663 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:30:12,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 01:30:12,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:30:12,867 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:30:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:30:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1689275670, now seen corresponding path program 3 times [2022-04-05 01:30:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:30:12,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293070287] [2022-04-05 01:30:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:30:12,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:30:12,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:30:12,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271504185] [2022-04-05 01:30:12,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:30:12,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:30:12,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:30:12,876 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:30:12,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 01:30:12,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 01:30:12,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:30:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 01:30:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:30:14,708 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 01:30:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-05 01:30:16,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:30:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 01:30:17,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:30:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293070287] [2022-04-05 01:30:17,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:30:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271504185] [2022-04-05 01:30:17,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271504185] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:30:17,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:30:17,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-04-05 01:30:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876023863] [2022-04-05 01:30:17,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:30:17,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 01:30:17,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:30:17,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 01:30:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-04-05 01:30:17,405 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:30:20,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:30:20,102 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2022-04-05 01:30:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 01:30:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2022-04-05 01:30:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:30:20,104 INFO L225 Difference]: With dead ends: 110 [2022-04-05 01:30:20,104 INFO L226 Difference]: Without dead ends: 50 [2022-04-05 01:30:20,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-04-05 01:30:20,105 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:30:20,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 161 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-04-05 01:30:20,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-05 01:30:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-04-05 01:30:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-05 01:30:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-04-05 01:30:20,109 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 53 [2022-04-05 01:30:20,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:30:20,109 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-04-05 01:30:20,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-05 01:30:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-04-05 01:30:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-05 01:30:20,110 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:30:20,110 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:30:20,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 01:30:20,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 01:30:20,319 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:30:20,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:30:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1043440105, now seen corresponding path program 2 times [2022-04-05 01:30:20,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:30:20,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59605308] [2022-04-05 01:30:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:30:20,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:30:20,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:30:20,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163518326] [2022-04-05 01:30:20,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 01:30:20,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:30:20,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:30:20,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:30:20,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 01:30:20,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 01:30:20,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:30:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-05 01:30:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:30:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 01:30:30,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:30:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 01:30:47,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:30:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59605308] [2022-04-05 01:30:47,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:30:47,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163518326] [2022-04-05 01:30:47,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163518326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 01:30:47,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 01:30:47,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2022-04-05 01:30:47,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714743235] [2022-04-05 01:30:47,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 01:30:47,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 01:30:47,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:30:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 01:30:47,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-04-05 01:30:47,909 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 01:31:02,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:31:02,419 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-04-05 01:31:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-05 01:31:02,420 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 53 [2022-04-05 01:31:02,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:31:02,421 INFO L225 Difference]: With dead ends: 82 [2022-04-05 01:31:02,421 INFO L226 Difference]: Without dead ends: 82 [2022-04-05 01:31:02,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=379, Invalid=1601, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 01:31:02,423 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 126 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-05 01:31:02,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 262 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-04-05 01:31:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-05 01:31:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-05 01:31:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 62 states have internal predecessors, (62), 14 states have call successors, (14), 7 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 01:31:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-04-05 01:31:02,439 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 53 [2022-04-05 01:31:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:31:02,439 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-04-05 01:31:02,440 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 29 states have internal predecessors, (55), 11 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2022-04-05 01:31:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-04-05 01:31:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-05 01:31:02,443 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:31:02,443 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:31:02,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 01:31:02,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 01:31:02,660 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:31:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:31:02,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1099173111, now seen corresponding path program 3 times [2022-04-05 01:31:02,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:31:02,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324127785] [2022-04-05 01:31:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:31:02,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:31:02,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:31:02,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983918336] [2022-04-05 01:31:02,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 01:31:02,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:31:02,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:31:02,678 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:31:02,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 01:31:02,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-05 01:31:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:31:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 01:31:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:31:15,996 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-05 01:31:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 46 proven. 246 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-05 01:31:19,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 01:31:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:31:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324127785] [2022-04-05 01:31:25,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:31:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983918336] [2022-04-05 01:31:25,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983918336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 01:31:25,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 01:31:25,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-04-05 01:31:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590953836] [2022-04-05 01:31:25,807 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 01:31:25,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 01:31:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 01:31:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 01:31:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1404, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 01:31:25,808 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 01:32:41,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 01:32:41,018 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-04-05 01:32:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-05 01:32:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 107 [2022-04-05 01:32:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 01:32:41,019 INFO L225 Difference]: With dead ends: 91 [2022-04-05 01:32:41,019 INFO L226 Difference]: Without dead ends: 91 [2022-04-05 01:32:41,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 92.9s TimeCoverageRelationStatistics Valid=1418, Invalid=4279, Unknown=3, NotChecked=0, Total=5700 [2022-04-05 01:32:41,021 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 01:32:41,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 146 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 207 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-04-05 01:32:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-05 01:32:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-05 01:32:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 69 states have internal predecessors, (69), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-05 01:32:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2022-04-05 01:32:41,024 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 107 [2022-04-05 01:32:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 01:32:41,025 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2022-04-05 01:32:41,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-04-05 01:32:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2022-04-05 01:32:41,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-05 01:32:41,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 01:32:41,026 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 01:32:41,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 01:32:41,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 01:32:41,226 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 01:32:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 01:32:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 160684340, now seen corresponding path program 4 times [2022-04-05 01:32:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 01:32:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184402654] [2022-04-05 01:32:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 01:32:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 01:32:41,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 01:32:41,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687738184] [2022-04-05 01:32:41,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 01:32:41,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 01:32:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 01:32:41,237 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 01:32:41,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 01:32:41,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 01:32:41,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 01:32:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-05 01:32:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 01:33:25,589 WARN L232 SmtUtils]: Spent 26.46s on a formula simplification. DAG size of input: 6594 DAG size of output: 3010 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-05 01:33:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 01:33:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184402654] [2022-04-05 01:33:54,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 01:33:54,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687738184] [2022-04-05 01:33:54,636 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-04-05 01:33:54,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 01:33:54,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 01:33:54,853 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Possible infinite loop detected aux_div_aux_div_v_main_~x~0_BEFORE_CALL_40_34_197 already exists at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:199) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:216) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:589) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.findTreatableDivModSubterm(SolveForSubjectUtils.java:577) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.solveForSubject(SolveForSubjectUtils.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:490) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:422) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperMcsbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:311) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:327) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:234) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:201) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:185) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:152) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:904) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateCompat(PartialQuantifierElimination.java:130) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.constructQuantifiedFormula(TermDomainOperationProvider.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.modularPostconditionCall(PredicateTransformer.java:178) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:172) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:412) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-05 01:33:54,855 INFO L158 Benchmark]: Toolchain (without parser) took 288657.08ms. Allocated memory was 208.7MB in the beginning and 674.2MB in the end (delta: 465.6MB). Free memory was 152.1MB in the beginning and 259.0MB in the end (delta: -106.9MB). Peak memory consumption was 358.3MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,855 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory was 168.2MB in the beginning and 168.1MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 01:33:54,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.79ms. Allocated memory is still 208.7MB. Free memory was 151.9MB in the beginning and 179.1MB in the end (delta: -27.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,856 INFO L158 Benchmark]: Boogie Preprocessor took 33.60ms. Allocated memory is still 208.7MB. Free memory was 179.1MB in the beginning and 177.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,856 INFO L158 Benchmark]: RCFGBuilder took 252.12ms. Allocated memory is still 208.7MB. Free memory was 177.7MB in the beginning and 167.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,856 INFO L158 Benchmark]: IcfgTransformer took 19.98ms. Allocated memory is still 208.7MB. Free memory was 167.6MB in the beginning and 166.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,856 INFO L158 Benchmark]: TraceAbstraction took 288078.68ms. Allocated memory was 208.7MB in the beginning and 674.2MB in the end (delta: 465.6MB). Free memory was 165.8MB in the beginning and 259.0MB in the end (delta: -93.2MB). Peak memory consumption was 373.2MB. Max. memory is 8.0GB. [2022-04-05 01:33:54,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 208.7MB. Free memory was 168.2MB in the beginning and 168.1MB in the end (delta: 78.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 264.79ms. Allocated memory is still 208.7MB. Free memory was 151.9MB in the beginning and 179.1MB in the end (delta: -27.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.60ms. Allocated memory is still 208.7MB. Free memory was 179.1MB in the beginning and 177.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 252.12ms. Allocated memory is still 208.7MB. Free memory was 177.7MB in the beginning and 167.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 19.98ms. Allocated memory is still 208.7MB. Free memory was 167.6MB in the beginning and 166.2MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 288078.68ms. Allocated memory was 208.7MB in the beginning and 674.2MB in the end (delta: 465.6MB). Free memory was 165.8MB in the beginning and 259.0MB in the end (delta: -93.2MB). Peak memory consumption was 373.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Possible infinite loop detected aux_div_aux_div_v_main_~x~0_BEFORE_CALL_40_34_197 already exists de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Possible infinite loop detected aux_div_aux_div_v_main_~x~0_BEFORE_CALL_40_34_197 already exists: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.SolveForSubjectUtils.tryToHandleDivModSubterm(SolveForSubjectUtils.java:199) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-05 01:33:55,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...