/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-scaling/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 14:29:27,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 14:29:27,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 14:29:27,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 14:29:27,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 14:29:27,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 14:29:27,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 14:29:27,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 14:29:27,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 14:29:27,738 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 14:29:27,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 14:29:27,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 14:29:27,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 14:29:27,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 14:29:27,741 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 14:29:27,742 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 14:29:27,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 14:29:27,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 14:29:27,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 14:29:27,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 14:29:27,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 14:29:27,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 14:29:27,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 14:29:27,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 14:29:27,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 14:29:27,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 14:29:27,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 14:29:27,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 14:29:27,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 14:29:27,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 14:29:27,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 14:29:27,762 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 14:29:27,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 14:29:27,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 14:29:27,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 14:29:27,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 14:29:27,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 14:29:27,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 14:29:27,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 14:29:27,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 14:29:27,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 14:29:27,769 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 14:29:27,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 14:29:27,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 14:29:27,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 14:29:27,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 14:29:27,785 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 14:29:27,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 14:29:27,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 14:29:27,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 14:29:27,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 14:29:27,785 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 14:29:27,786 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 14:29:27,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 14:29:27,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:29:27,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 14:29:27,786 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 14:29:27,786 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 14:29:27,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 14:29:27,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 14:29:28,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 14:29:28,002 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 14:29:28,003 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 14:29:28,004 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 14:29:28,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-01-31 14:29:28,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea15832e/f87a25d9f1db415eaa47866a4a382074/FLAG899918027 [2022-01-31 14:29:28,384 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 14:29:28,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-01-31 14:29:28,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea15832e/f87a25d9f1db415eaa47866a4a382074/FLAG899918027 [2022-01-31 14:29:28,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ea15832e/f87a25d9f1db415eaa47866a4a382074 [2022-01-31 14:29:28,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 14:29:28,805 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 14:29:28,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 14:29:28,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 14:29:28,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 14:29:28,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:29:28" (1/1) ... [2022-01-31 14:29:28,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc09e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:28, skipping insertion in model container [2022-01-31 14:29:28,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:29:28" (1/1) ... [2022-01-31 14:29:28,814 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 14:29:28,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 14:29:28,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-01-31 14:29:28,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:29:28,987 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 14:29:28,998 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c[490,503] [2022-01-31 14:29:29,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 14:29:29,025 INFO L208 MainTranslator]: Completed translation [2022-01-31 14:29:29,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29 WrapperNode [2022-01-31 14:29:29,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 14:29:29,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 14:29:29,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 14:29:29,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 14:29:29,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 14:29:29,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 14:29:29,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 14:29:29,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 14:29:29,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 14:29:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:29,095 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) [2022-01-31 14:29:29,103 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 [2022-01-31 14:29:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 14:29:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 14:29:29,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 14:29:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 14:29:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 14:29:29,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 14:29:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 14:29:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 14:29:29,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 14:29:29,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 14:29:29,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 14:29:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 14:29:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 14:29:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 14:29:29,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 14:29:29,177 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 14:29:29,178 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 14:29:29,354 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 14:29:29,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 14:29:29,358 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 14:29:29,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:29:29 BoogieIcfgContainer [2022-01-31 14:29:29,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 14:29:29,360 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 14:29:29,360 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 14:29:29,367 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 14:29:29,369 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:29:29" (1/1) ... [2022-01-31 14:29:29,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:29:29 BasicIcfg [2022-01-31 14:29:29,385 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 14:29:29,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 14:29:29,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 14:29:29,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 14:29:29,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:29:28" (1/4) ... [2022-01-31 14:29:29,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339618a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:29:29, skipping insertion in model container [2022-01-31 14:29:29,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:29:29" (2/4) ... [2022-01-31 14:29:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339618a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:29:29, skipping insertion in model container [2022-01-31 14:29:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:29:29" (3/4) ... [2022-01-31 14:29:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339618a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 02:29:29, skipping insertion in model container [2022-01-31 14:29:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 02:29:29" (4/4) ... [2022-01-31 14:29:29,397 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.cJordan [2022-01-31 14:29:29,402 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 14:29:29,402 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 14:29:29,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 14:29:29,445 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 14:29:29,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 14:29:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 14:29:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 14:29:29,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:29,463 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:29,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-01-31 14:29:29,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557452272] [2022-01-31 14:29:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:29,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 14:29:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 14:29:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 14:29:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 14:29:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 14:29:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 14:29:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 14:29:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 14:29:29,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557452272] [2022-01-31 14:29:29,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557452272] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:29:29,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:29:29,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 14:29:29,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60058584] [2022-01-31 14:29:29,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:29:29,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 14:29:29,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 14:29:29,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:29:29,674 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:29:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:29,733 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-01-31 14:29:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 14:29:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-01-31 14:29:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:29,743 INFO L225 Difference]: With dead ends: 40 [2022-01-31 14:29:29,743 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 14:29:29,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 14:29:29,747 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:29,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:29:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 14:29:29,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 14:29:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 14:29:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-01-31 14:29:29,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-01-31 14:29:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-01-31 14:29:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:29:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-01-31 14:29:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 14:29:29,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:29,775 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:29,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 14:29:29,776 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-01-31 14:29:29,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:29,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819213219] [2022-01-31 14:29:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:29,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:29,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:29,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955304925] [2022-01-31 14:29:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:29,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:29,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:29,803 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) [2022-01-31 14:29:29,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 14:29:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 14:29:29,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 14:29:30,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 14:29:30,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:30,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819213219] [2022-01-31 14:29:30,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955304925] [2022-01-31 14:29:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955304925] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:29:30,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:29:30,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-01-31 14:29:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847162221] [2022-01-31 14:29:30,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:30,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 14:29:30,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:30,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 14:29:30,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:29:30,204 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:29:30,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:30,283 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-01-31 14:29:30,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:29:30,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-01-31 14:29:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:30,285 INFO L225 Difference]: With dead ends: 44 [2022-01-31 14:29:30,285 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 14:29:30,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:29:30,287 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:30,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:29:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 14:29:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-01-31 14:29:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 14:29:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-01-31 14:29:30,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-01-31 14:29:30,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:30,299 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-01-31 14:29:30,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 14:29:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-01-31 14:29:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 14:29:30,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:30,300 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:30,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:30,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:30,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:30,521 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-01-31 14:29:30,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969717325] [2022-01-31 14:29:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:30,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:30,532 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:30,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899239628] [2022-01-31 14:29:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:30,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:30,534 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) [2022-01-31 14:29:30,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 14:29:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:30,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 14:29:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 14:29:30,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 14:29:30,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969717325] [2022-01-31 14:29:30,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:30,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899239628] [2022-01-31 14:29:30,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899239628] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:30,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:30,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-01-31 14:29:30,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218121945] [2022-01-31 14:29:30,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:29:30,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:29:30,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:29:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:29:30,823 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 14:29:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:30,854 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-01-31 14:29:30,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:29:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-01-31 14:29:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:30,855 INFO L225 Difference]: With dead ends: 41 [2022-01-31 14:29:30,856 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 14:29:30,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:29:30,856 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:30,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:29:30,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 14:29:30,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 14:29:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 14:29:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-01-31 14:29:30,861 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-01-31 14:29:30,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:30,861 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-01-31 14:29:30,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-31 14:29:30,861 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-01-31 14:29:30,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 14:29:30,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:30,862 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:30,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 14:29:31,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:31,091 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-01-31 14:29:31,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:31,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133664852] [2022-01-31 14:29:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:31,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:31,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267355086] [2022-01-31 14:29:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:31,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:31,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:31,123 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) [2022-01-31 14:29:31,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 14:29:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:31,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 14:29:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-31 14:29:31,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:31,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:31,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133664852] [2022-01-31 14:29:31,457 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:31,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267355086] [2022-01-31 14:29:31,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267355086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:31,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:31,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-01-31 14:29:31,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699503803] [2022-01-31 14:29:31,457 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:31,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 14:29:31,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 14:29:31,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:29:31,458 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 14:29:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:31,629 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-01-31 14:29:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 14:29:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-01-31 14:29:31,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:31,630 INFO L225 Difference]: With dead ends: 52 [2022-01-31 14:29:31,630 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 14:29:31,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:29:31,631 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:31,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:29:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 14:29:31,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-31 14:29:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 14:29:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-01-31 14:29:31,636 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-01-31 14:29:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:31,637 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-01-31 14:29:31,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-31 14:29:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-01-31 14:29:31,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 14:29:31,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:31,638 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:31,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-31 14:29:31,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:31,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-01-31 14:29:31,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512674315] [2022-01-31 14:29:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:31,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:31,868 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:31,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42542255] [2022-01-31 14:29:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:31,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:31,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:31,871 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) [2022-01-31 14:29:31,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 14:29:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 14:29:31,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 14:29:32,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 14:29:32,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512674315] [2022-01-31 14:29:32,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:32,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42542255] [2022-01-31 14:29:32,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42542255] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:32,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:32,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-01-31 14:29:32,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983097727] [2022-01-31 14:29:32,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:29:32,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:29:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:29:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-31 14:29:32,261 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 14:29:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:32,312 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-01-31 14:29:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 14:29:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-01-31 14:29:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:32,314 INFO L225 Difference]: With dead ends: 56 [2022-01-31 14:29:32,314 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 14:29:32,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:29:32,315 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:32,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:29:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 14:29:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-01-31 14:29:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 14:29:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-01-31 14:29:32,319 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-01-31 14:29:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:32,319 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-01-31 14:29:32,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-31 14:29:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-01-31 14:29:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 14:29:32,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:32,320 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:32,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:32,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:32,528 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-01-31 14:29:32,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:32,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837788050] [2022-01-31 14:29:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:32,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:32,542 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:32,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363417557] [2022-01-31 14:29:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:32,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:32,551 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) [2022-01-31 14:29:32,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 14:29:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:32,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 14:29:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-31 14:29:32,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:32,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837788050] [2022-01-31 14:29:32,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363417557] [2022-01-31 14:29:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363417557] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:32,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-01-31 14:29:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587722568] [2022-01-31 14:29:32,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 14:29:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 14:29:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:29:32,853 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 14:29:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:32,929 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-01-31 14:29:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 14:29:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-01-31 14:29:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:32,934 INFO L225 Difference]: With dead ends: 60 [2022-01-31 14:29:32,935 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 14:29:32,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:29:32,937 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:32,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:29:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 14:29:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-01-31 14:29:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 14:29:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-01-31 14:29:32,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-01-31 14:29:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:32,946 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-01-31 14:29:32,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-31 14:29:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-01-31 14:29:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 14:29:32,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:32,947 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:32,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:33,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:33,170 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:33,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-01-31 14:29:33,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:33,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237865700] [2022-01-31 14:29:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:33,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:33,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256391677] [2022-01-31 14:29:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:33,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:33,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:33,191 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) [2022-01-31 14:29:33,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 14:29:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 14:29:33,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:29:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 14:29:33,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:33,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237865700] [2022-01-31 14:29:33,468 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:33,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256391677] [2022-01-31 14:29:33,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256391677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:29:33,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:29:33,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-01-31 14:29:33,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610808916] [2022-01-31 14:29:33,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:33,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:29:33,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:29:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-01-31 14:29:33,470 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-31 14:29:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:33,584 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-01-31 14:29:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:29:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-01-31 14:29:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:33,589 INFO L225 Difference]: With dead ends: 98 [2022-01-31 14:29:33,589 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 14:29:33,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:29:33,589 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:33,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:29:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 14:29:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-01-31 14:29:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 14:29:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-01-31 14:29:33,598 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-01-31 14:29:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:33,598 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-01-31 14:29:33,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-31 14:29:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-01-31 14:29:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 14:29:33,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:33,599 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:33,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-31 14:29:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:33,816 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:33,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:33,817 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-01-31 14:29:33,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:33,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121361004] [2022-01-31 14:29:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:33,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:33,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393018932] [2022-01-31 14:29:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:33,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:33,826 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) [2022-01-31 14:29:33,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 14:29:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 14:29:33,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 14:29:34,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 14:29:34,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121361004] [2022-01-31 14:29:34,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393018932] [2022-01-31 14:29:34,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393018932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:29:34,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:29:34,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-01-31 14:29:34,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957292014] [2022-01-31 14:29:34,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:34,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 14:29:34,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 14:29:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-01-31 14:29:34,162 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-01-31 14:29:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:34,339 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-01-31 14:29:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:29:34,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-01-31 14:29:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:34,342 INFO L225 Difference]: With dead ends: 130 [2022-01-31 14:29:34,342 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 14:29:34,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-31 14:29:34,343 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:34,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:29:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 14:29:34,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-01-31 14:29:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 14:29:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-01-31 14:29:34,364 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-01-31 14:29:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:34,364 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-01-31 14:29:34,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-01-31 14:29:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-01-31 14:29:34,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 14:29:34,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:34,369 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:34,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:34,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:34,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:34,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:34,584 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-01-31 14:29:34,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:34,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915352740] [2022-01-31 14:29:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:34,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:34,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130275215] [2022-01-31 14:29:34,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:29:34,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:34,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:34,607 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) [2022-01-31 14:29:34,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 14:29:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:29:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:29:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 14:29:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-31 14:29:35,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-01-31 14:29:35,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915352740] [2022-01-31 14:29:35,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:35,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130275215] [2022-01-31 14:29:35,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130275215] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:29:35,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:29:35,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-01-31 14:29:35,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191891691] [2022-01-31 14:29:35,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:35,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 14:29:35,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:35,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 14:29:35,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-31 14:29:35,163 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-31 14:29:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:36,100 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-01-31 14:29:36,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 14:29:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-01-31 14:29:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:36,102 INFO L225 Difference]: With dead ends: 126 [2022-01-31 14:29:36,102 INFO L226 Difference]: Without dead ends: 126 [2022-01-31 14:29:36,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-31 14:29:36,102 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:36,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 14:29:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-31 14:29:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-01-31 14:29:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 14:29:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-01-31 14:29:36,108 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-01-31 14:29:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:36,109 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-01-31 14:29:36,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-01-31 14:29:36,109 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-01-31 14:29:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 14:29:36,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:36,110 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:36,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:36,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-31 14:29:36,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:36,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-01-31 14:29:36,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:36,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763966829] [2022-01-31 14:29:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:36,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:36,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:36,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19437410] [2022-01-31 14:29:36,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:29:36,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:36,340 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) [2022-01-31 14:29:36,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 14:29:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 14:29:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:29:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-31 14:29:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-01-31 14:29:36,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:36,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763966829] [2022-01-31 14:29:36,765 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:36,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19437410] [2022-01-31 14:29:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19437410] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:36,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:36,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-31 14:29:36,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425752033] [2022-01-31 14:29:36,765 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:36,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 14:29:36,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 14:29:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 14:29:36,767 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-31 14:29:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:36,936 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-01-31 14:29:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 14:29:36,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-01-31 14:29:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:36,938 INFO L225 Difference]: With dead ends: 142 [2022-01-31 14:29:36,938 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 14:29:36,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:29:36,939 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:36,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 14:29:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 14:29:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-01-31 14:29:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-31 14:29:36,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-01-31 14:29:36,964 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-01-31 14:29:36,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:36,965 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-01-31 14:29:36,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-31 14:29:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-01-31 14:29:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 14:29:36,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:36,969 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:36,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:37,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 14:29:37,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:37,184 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-01-31 14:29:37,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:37,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176704049] [2022-01-31 14:29:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:37,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:37,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8809704] [2022-01-31 14:29:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:37,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:37,199 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) [2022-01-31 14:29:37,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 14:29:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 14:29:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-01-31 14:29:37,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-01-31 14:29:37,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176704049] [2022-01-31 14:29:37,901 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:37,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8809704] [2022-01-31 14:29:37,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8809704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:29:37,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:29:37,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-31 14:29:37,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169419869] [2022-01-31 14:29:37,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 14:29:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 14:29:37,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-01-31 14:29:37,903 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-01-31 14:29:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:39,873 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-01-31 14:29:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 14:29:39,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-01-31 14:29:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:39,875 INFO L225 Difference]: With dead ends: 226 [2022-01-31 14:29:39,875 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 14:29:39,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-01-31 14:29:39,876 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:39,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 14:29:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 14:29:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-01-31 14:29:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 14:29:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-01-31 14:29:39,883 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-01-31 14:29:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:39,884 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-01-31 14:29:39,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-01-31 14:29:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-01-31 14:29:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 14:29:39,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:39,885 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:39,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:40,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 14:29:40,086 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:40,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-01-31 14:29:40,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:40,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982712540] [2022-01-31 14:29:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:40,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:40,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:40,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412549252] [2022-01-31 14:29:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:40,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:40,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:40,116 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) [2022-01-31 14:29:40,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 14:29:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 14:29:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 14:29:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-01-31 14:29:40,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:40,968 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:29:45,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982712540] [2022-01-31 14:29:45,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:45,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412549252] [2022-01-31 14:29:45,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412549252] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:45,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:45,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-01-31 14:29:45,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989215273] [2022-01-31 14:29:45,743 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:45,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 14:29:45,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 14:29:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2022-01-31 14:29:45,743 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:29:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:46,244 INFO L93 Difference]: Finished difference Result 224 states and 304 transitions. [2022-01-31 14:29:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 14:29:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-01-31 14:29:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:46,246 INFO L225 Difference]: With dead ends: 224 [2022-01-31 14:29:46,246 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 14:29:46,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=71, Invalid=269, Unknown=2, NotChecked=0, Total=342 [2022-01-31 14:29:46,247 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 26 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:46,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 323 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 14:29:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 14:29:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-01-31 14:29:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 14:29:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-01-31 14:29:46,254 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-01-31 14:29:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:46,254 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-01-31 14:29:46,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-01-31 14:29:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-01-31 14:29:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 14:29:46,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:46,255 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:46,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:46,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 14:29:46,471 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:46,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:46,472 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-01-31 14:29:46,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:46,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885212249] [2022-01-31 14:29:46,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:46,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:46,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:46,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298999088] [2022-01-31 14:29:46,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:29:46,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:46,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:46,488 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:29:46,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 14:29:46,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:29:46,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:29:46,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 14:29:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-01-31 14:29:46,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 14:29:46,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885212249] [2022-01-31 14:29:46,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298999088] [2022-01-31 14:29:46,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298999088] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 14:29:46,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 14:29:46,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 14:29:46,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105374388] [2022-01-31 14:29:46,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 14:29:46,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 14:29:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 14:29:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 14:29:46,676 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-31 14:29:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:46,719 INFO L93 Difference]: Finished difference Result 201 states and 262 transitions. [2022-01-31 14:29:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 14:29:46,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-01-31 14:29:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:46,720 INFO L225 Difference]: With dead ends: 201 [2022-01-31 14:29:46,720 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 14:29:46,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-31 14:29:46,721 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:46,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 14:29:46,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 14:29:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-01-31 14:29:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 14:29:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-01-31 14:29:46,726 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-01-31 14:29:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:46,726 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-01-31 14:29:46,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-01-31 14:29:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-01-31 14:29:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 14:29:46,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:46,727 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:46,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:46,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 14:29:46,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:46,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 2 times [2022-01-31 14:29:46,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:46,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151258481] [2022-01-31 14:29:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:46,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:46,936 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352377284] [2022-01-31 14:29:46,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:29:46,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:46,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:29:46,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 14:29:47,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:29:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:29:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-01-31 14:29:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-01-31 14:29:48,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:29:53,579 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:29:56,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:29:56,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151258481] [2022-01-31 14:29:56,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:29:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352377284] [2022-01-31 14:29:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352377284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:29:56,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:29:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-01-31 14:29:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857404825] [2022-01-31 14:29:56,729 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:29:56,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 14:29:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:29:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 14:29:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=437, Unknown=1, NotChecked=0, Total=552 [2022-01-31 14:29:56,730 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-31 14:29:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:29:58,797 INFO L93 Difference]: Finished difference Result 192 states and 248 transitions. [2022-01-31 14:29:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 14:29:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-01-31 14:29:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:29:58,798 INFO L225 Difference]: With dead ends: 192 [2022-01-31 14:29:58,799 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 14:29:58,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-01-31 14:29:58,799 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:29:58,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 299 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 14:29:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 14:29:58,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-01-31 14:29:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 14:29:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-01-31 14:29:58,804 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 129 [2022-01-31 14:29:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:29:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-01-31 14:29:58,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-01-31 14:29:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-01-31 14:29:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 14:29:58,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:29:58,806 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:29:58,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 14:29:59,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 14:29:59,006 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:29:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:29:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 3 times [2022-01-31 14:29:59,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:29:59,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539219278] [2022-01-31 14:29:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:29:59,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:29:59,015 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:29:59,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717267494] [2022-01-31 14:29:59,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:29:59,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:29:59,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:29:59,017 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:29:59,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 14:29:59,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 14:29:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:29:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-31 14:29:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:29:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-01-31 14:29:59,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:30:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 101 proven. 45 refuted. 2 times theorem prover too weak. 402 trivial. 0 not checked. [2022-01-31 14:30:30,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:30:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539219278] [2022-01-31 14:30:30,034 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:30:30,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717267494] [2022-01-31 14:30:30,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717267494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:30:30,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:30:30,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-01-31 14:30:30,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57974297] [2022-01-31 14:30:30,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:30:30,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 14:30:30,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:30:30,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 14:30:30,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=353, Unknown=3, NotChecked=0, Total=462 [2022-01-31 14:30:30,035 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-01-31 14:30:32,426 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 [] [2022-01-31 14:30:59,722 WARN L228 SmtUtils]: Spent 24.27s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:31:01,740 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~x~0)) (.cse2 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (= (+ .cse1 .cse2 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0)))) (let ((.cse5 (not .cse0)) (.cse4 (* (- 1) c_main_~b~0)) (.cse19 (* (- 1) c_main_~r~0)) (.cse20 (* (- 1) c_main_~p~0))) (and (or .cse0 (not (= c_main_~b~0 (+ .cse1 .cse2)))) (let ((.cse6 (+ (* (- 1) c_main_~q~0) c_main_~p~0)) (.cse9 (+ (* (- 1) c_main_~s~0) c_main_~r~0))) (let ((.cse7 (* .cse9 c_main_~y~0)) (.cse8 (* .cse6 c_main_~x~0))) (let ((.cse3 (+ .cse7 .cse8))) (or (not (= .cse3 (+ .cse4 c_main_~a~0))) .cse5 (= (+ (* .cse6 c_main_~xy~0) .cse7 .cse8 (* c_main_~yy~0 .cse9)) (+ .cse7 .cse8 (* .cse3 c_main_~y~0))))))) (let ((.cse13 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse11 (* c_main_~p~0 c_main_~x~0)) (.cse12 (* c_main_~r~0 c_main_~y~0)) (.cse14 (* (- 1) c_main_~q~0 c_main_~x~0))) (let ((.cse10 (+ c_main_~b~0 .cse13 .cse11 .cse12 .cse14))) (or (not (= (+ (* .cse10 c_main_~y~0) .cse11 .cse12) (+ c_main_~b~0 (* c_main_~yy~0 c_main_~r~0) .cse13 .cse11 .cse12 .cse14 (* c_main_~xy~0 c_main_~p~0)))) (not (= .cse10 c_main_~a~0)) (let ((.cse17 (+ c_main_~q~0 .cse20)) (.cse18 (+ c_main_~s~0 .cse19))) (let ((.cse15 (* c_main_~y~0 .cse18)) (.cse16 (* .cse17 c_main_~x~0))) (= (+ (* (+ .cse15 .cse16) c_main_~y~0) .cse15 .cse16) (+ .cse15 (* c_main_~xy~0 .cse17) .cse16 (* c_main_~yy~0 .cse18)))))))) (let ((.cse26 (+ c_main_~k~0 1))) (let ((.cse23 (+ (* (- 1) (* c_main_~s~0 .cse26)) c_main_~r~0)) (.cse22 (+ (* (- 1) c_main_~q~0 .cse26) c_main_~p~0))) (let ((.cse21 (* .cse22 c_main_~x~0)) (.cse24 (* .cse23 c_main_~y~0))) (let ((.cse25 (+ .cse21 .cse24))) (or .cse5 (= (+ .cse21 (* .cse22 c_main_~xy~0) (* c_main_~yy~0 .cse23) .cse24) (+ (* .cse25 c_main_~y~0) .cse21 .cse24)) (not (= .cse25 (+ .cse4 c_main_~c~0)))))))) (let ((.cse29 (* c_main_~s~0 c_main_~k~0)) (.cse30 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse32 (+ c_main_~q~0 .cse20 (* (- 1) .cse30))) (.cse34 (+ c_main_~s~0 .cse29 .cse19))) (let ((.cse31 (* .cse34 c_main_~y~0)) (.cse33 (* .cse32 c_main_~x~0))) (let ((.cse35 (+ .cse31 .cse33))) (or (not (let ((.cse28 (+ c_main_~p~0 .cse30)) (.cse27 (+ c_main_~r~0 (* (- 1) .cse29)))) (= (+ (* .cse27 c_main_~y~0) (* .cse28 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse28) c_main_~c~0 (* c_main_~yy~0 .cse27))))) (= (+ .cse31 (* .cse32 c_main_~xy~0) .cse33 (* c_main_~yy~0 .cse34)) (+ (* .cse35 c_main_~y~0) .cse31 .cse33)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse35))))))))))) is different from false [2022-01-31 14:31:10,964 WARN L228 SmtUtils]: Spent 9.06s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:31:12,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:15,055 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~q~0 c_main_~x~0)) (.cse2 (* c_main_~s~0 c_main_~y~0))) (let ((.cse0 (= (+ .cse1 .cse2 (* c_main_~b~0 c_main_~y~0)) (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) c_main_~b~0))) (.cse12 (* (- 1) c_main_~r~0)) (.cse13 (* (- 1) c_main_~p~0))) (and (or .cse0 (not (= c_main_~b~0 (+ .cse1 .cse2)))) (let ((.cse6 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse4 (* c_main_~p~0 c_main_~x~0)) (.cse5 (* c_main_~r~0 c_main_~y~0)) (.cse7 (* (- 1) c_main_~q~0 c_main_~x~0))) (let ((.cse3 (+ c_main_~b~0 .cse6 .cse4 .cse5 .cse7))) (or (not (= (+ (* .cse3 c_main_~y~0) .cse4 .cse5) (+ c_main_~b~0 (* c_main_~yy~0 c_main_~r~0) .cse6 .cse4 .cse5 .cse7 (* c_main_~xy~0 c_main_~p~0)))) (not (= .cse3 c_main_~a~0)) (let ((.cse10 (+ c_main_~q~0 .cse13)) (.cse11 (+ c_main_~s~0 .cse12))) (let ((.cse8 (* c_main_~y~0 .cse11)) (.cse9 (* .cse10 c_main_~x~0))) (= (+ (* (+ .cse8 .cse9) c_main_~y~0) .cse8 .cse9) (+ .cse8 (* c_main_~xy~0 .cse10) .cse9 (* c_main_~yy~0 .cse11)))))))) (let ((.cse19 (+ c_main_~k~0 1))) (let ((.cse16 (+ (* (- 1) (* c_main_~s~0 .cse19)) c_main_~r~0)) (.cse15 (+ (* (- 1) c_main_~q~0 .cse19) c_main_~p~0))) (let ((.cse14 (* .cse15 c_main_~x~0)) (.cse17 (* .cse16 c_main_~y~0))) (let ((.cse18 (+ .cse14 .cse17))) (or (not .cse0) (= (+ .cse14 (* .cse15 c_main_~xy~0) (* c_main_~yy~0 .cse16) .cse17) (+ (* .cse18 c_main_~y~0) .cse14 .cse17)) (not (= .cse18 (+ (* (- 1) c_main_~b~0) c_main_~c~0)))))))) (let ((.cse22 (* c_main_~s~0 c_main_~k~0)) (.cse23 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse25 (+ c_main_~q~0 .cse13 (* (- 1) .cse23))) (.cse27 (+ c_main_~s~0 .cse22 .cse12))) (let ((.cse24 (* .cse27 c_main_~y~0)) (.cse26 (* .cse25 c_main_~x~0))) (let ((.cse28 (+ .cse24 .cse26))) (or (not (let ((.cse21 (+ c_main_~p~0 .cse23)) (.cse20 (+ c_main_~r~0 (* (- 1) .cse22)))) (= (+ (* .cse20 c_main_~y~0) (* .cse21 c_main_~x~0) (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse21) c_main_~c~0 (* c_main_~yy~0 .cse20))))) (= (+ .cse24 (* .cse25 c_main_~xy~0) .cse26 (* c_main_~yy~0 .cse27)) (+ (* .cse28 c_main_~y~0) .cse24 .cse26)) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) .cse28)))))))))) is different from false [2022-01-31 14:31:17,982 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 [] [2022-01-31 14:31:23,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:24,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:28,766 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:32,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:33,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:36,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:38,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:40,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:43,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:45,095 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:46,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:48,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:57,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:31:59,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:01,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:03,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:06,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:08,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:12,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:14,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:16,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:20,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:26,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:32:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:32:26,086 INFO L93 Difference]: Finished difference Result 248 states and 325 transitions. [2022-01-31 14:32:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 14:32:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-01-31 14:32:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:32:26,089 INFO L225 Difference]: With dead ends: 248 [2022-01-31 14:32:26,089 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 14:32:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 74.3s TimeCoverageRelationStatistics Valid=343, Invalid=989, Unknown=8, NotChecked=142, Total=1482 [2022-01-31 14:32:26,090 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 206 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 56.9s IncrementalHoareTripleChecker+Time [2022-01-31 14:32:26,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 506 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 704 Invalid, 20 Unknown, 3 Unchecked, 56.9s Time] [2022-01-31 14:32:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 14:32:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 232. [2022-01-31 14:32:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.125984251968504) internal successors, (143), 129 states have internal predecessors, (143), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 14:32:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 303 transitions. [2022-01-31 14:32:26,095 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 303 transitions. Word has length 132 [2022-01-31 14:32:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:32:26,096 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 303 transitions. [2022-01-31 14:32:26,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-01-31 14:32:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 303 transitions. [2022-01-31 14:32:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 14:32:26,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:32:26,097 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:32:26,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 14:32:26,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:26,312 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:32:26,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:32:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-01-31 14:32:26,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:32:26,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164052568] [2022-01-31 14:32:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:32:26,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:32:26,325 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:32:26,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495410390] [2022-01-31 14:32:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 14:32:26,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:32:26,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:32:26,348 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:32:26,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 14:32:26,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 14:32:26,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:32:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 14:32:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:32:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-01-31 14:32:28,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:32:28,953 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:32:28,955 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:32:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-01-31 14:32:42,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:32:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164052568] [2022-01-31 14:32:42,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:32:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495410390] [2022-01-31 14:32:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495410390] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 14:32:42,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 14:32:42,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-01-31 14:32:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595217355] [2022-01-31 14:32:42,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 14:32:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 14:32:42,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:32:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 14:32:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=673, Unknown=4, NotChecked=0, Total=812 [2022-01-31 14:32:42,855 INFO L87 Difference]: Start difference. First operand 232 states and 303 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-01-31 14:32:45,240 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 [] [2022-01-31 14:32:57,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:01,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:04,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:08,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:10,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:12,849 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:14,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:16,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:33:34,742 WARN L228 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:33:46,829 WARN L228 SmtUtils]: Spent 9.86s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:33:48,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:12,193 WARN L228 SmtUtils]: Spent 15.46s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:34:15,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:17,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:34:52,777 WARN L228 SmtUtils]: Spent 33.13s on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:35:19,017 WARN L228 SmtUtils]: Spent 22.89s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:35:22,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:35:31,884 WARN L228 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:35:34,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:35:49,234 WARN L228 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:35:53,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:35:54,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:36:06,361 WARN L228 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 99 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:36:10,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 14:36:12,979 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 [] [2022-01-31 14:36:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:36:14,653 INFO L93 Difference]: Finished difference Result 347 states and 476 transitions. [2022-01-31 14:36:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 14:36:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-01-31 14:36:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:36:14,655 INFO L225 Difference]: With dead ends: 347 [2022-01-31 14:36:14,655 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 14:36:14,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 171.8s TimeCoverageRelationStatistics Valid=886, Invalid=3525, Unknown=11, NotChecked=0, Total=4422 [2022-01-31 14:36:14,657 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 149 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 408 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2022-01-31 14:36:14,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 724 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1217 Invalid, 16 Unknown, 0 Unchecked, 53.1s Time] [2022-01-31 14:36:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 14:36:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 301. [2022-01-31 14:36:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 163 states have internal predecessors, (183), 113 states have call successors, (113), 27 states have call predecessors, (113), 26 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2022-01-31 14:36:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 407 transitions. [2022-01-31 14:36:14,665 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 407 transitions. Word has length 138 [2022-01-31 14:36:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:36:14,665 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 407 transitions. [2022-01-31 14:36:14,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-01-31 14:36:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 407 transitions. [2022-01-31 14:36:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 14:36:14,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:14,673 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:14,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 14:36:14,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 14:36:14,890 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:14,890 INFO L85 PathProgramCache]: Analyzing trace with hash -739364489, now seen corresponding path program 4 times [2022-01-31 14:36:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:14,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442564137] [2022-01-31 14:36:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:14,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:14,898 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330902843] [2022-01-31 14:36:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 14:36:14,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:14,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:14,899 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:36:14,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 14:36:15,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 14:36:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:36:15,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 99 conjunts are in the unsatisfiable core [2022-01-31 14:36:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:17,490 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:36:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 201 proven. 288 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-01-31 14:36:18,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:36:23,113 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:36:26,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 14:36:26,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442564137] [2022-01-31 14:36:26,000 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 14:36:26,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330902843] [2022-01-31 14:36:26,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330902843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 14:36:26,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 14:36:26,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-01-31 14:36:26,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923365347] [2022-01-31 14:36:26,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 14:36:26,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 14:36:26,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 14:36:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 14:36:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=648, Unknown=1, NotChecked=0, Total=812 [2022-01-31 14:36:26,002 INFO L87 Difference]: Start difference. First operand 301 states and 407 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-01-31 14:36:29,974 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 [] [2022-01-31 14:36:37,838 WARN L228 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 61 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:36:40,365 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 [] [2022-01-31 14:36:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 14:36:41,145 INFO L93 Difference]: Finished difference Result 386 states and 517 transitions. [2022-01-31 14:36:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 14:36:41,148 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 176 [2022-01-31 14:36:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 14:36:41,150 INFO L225 Difference]: With dead ends: 386 [2022-01-31 14:36:41,150 INFO L226 Difference]: Without dead ends: 386 [2022-01-31 14:36:41,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=207, Invalid=914, Unknown=1, NotChecked=0, Total=1122 [2022-01-31 14:36:41,150 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 91 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 14:36:41,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 645 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1035 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 14:36:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-31 14:36:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 381. [2022-01-31 14:36:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 207 states have internal predecessors, (232), 141 states have call successors, (141), 35 states have call predecessors, (141), 34 states have return successors, (139), 138 states have call predecessors, (139), 139 states have call successors, (139) [2022-01-31 14:36:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 512 transitions. [2022-01-31 14:36:41,166 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 512 transitions. Word has length 176 [2022-01-31 14:36:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 14:36:41,166 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 512 transitions. [2022-01-31 14:36:41,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-01-31 14:36:41,167 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 512 transitions. [2022-01-31 14:36:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 14:36:41,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 14:36:41,168 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 14:36:41,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 14:36:41,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-31 14:36:41,385 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 14:36:41,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 14:36:41,386 INFO L85 PathProgramCache]: Analyzing trace with hash 980979816, now seen corresponding path program 3 times [2022-01-31 14:36:41,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 14:36:41,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410395399] [2022-01-31 14:36:41,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 14:36:41,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 14:36:41,395 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 14:36:41,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14488803] [2022-01-31 14:36:41,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 14:36:41,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 14:36:41,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 14:36:41,397 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 14:36:41,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 14:36:41,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 14:36:41,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 14:36:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 14:36:41,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 14:36:42,737 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:36:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-01-31 14:36:43,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 14:36:43,808 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:37:22,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:39:28,534 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 14:42:31,568 WARN L228 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 14:43:33,722 WARN L860 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 0) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))))) is different from true [2022-01-31 14:44:05,791 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true