/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/hard-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 23:22:32,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 23:22:32,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 23:22:32,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 23:22:32,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 23:22:32,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 23:22:32,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 23:22:32,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 23:22:32,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 23:22:32,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 23:22:32,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 23:22:32,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 23:22:32,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 23:22:32,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 23:22:32,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 23:22:32,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 23:22:32,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 23:22:32,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 23:22:32,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 23:22:32,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 23:22:32,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 23:22:32,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 23:22:32,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 23:22:32,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 23:22:32,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-14 23:22:32,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-14 23:22:32,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-14 23:22:32,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-14 23:22:32,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-14 23:22:32,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-14 23:22:32,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-14 23:22:32,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-14 23:22:32,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-14 23:22:32,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-14 23:22:32,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-14 23:22:32,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-14 23:22:32,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-14 23:22:32,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-14 23:22:32,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 23:22:32,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 23:22:32,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 23:22:32,631 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 23:22:32,641 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 23:22:32,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 23:22:32,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 23:22:32,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 23:22:32,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 23:22:32,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:22:32,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 23:22:32,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 23:22:32,645 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 23:22:32,645 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 23:22:32,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 23:22:32,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 23:22:32,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 23:22:32,848 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 23:22:32,849 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 23:22:32,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2022-02-14 23:22:32,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a4c4c9a/108566b000e34f54b1ecbbdb9cbf3921/FLAG025e40189 [2022-02-14 23:22:33,289 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 23:22:33,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2022-02-14 23:22:33,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a4c4c9a/108566b000e34f54b1ecbbdb9cbf3921/FLAG025e40189 [2022-02-14 23:22:33,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9a4c4c9a/108566b000e34f54b1ecbbdb9cbf3921 [2022-02-14 23:22:33,309 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 23:22:33,310 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 23:22:33,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 23:22:33,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 23:22:33,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 23:22:33,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e24d12b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33, skipping insertion in model container [2022-02-14 23:22:33,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 23:22:33,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 23:22:33,462 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/hard-u_unwindbound50.c[537,550] [2022-02-14 23:22:33,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:22:33,477 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 23:22:33,484 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/hard-u_unwindbound50.c[537,550] [2022-02-14 23:22:33,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 23:22:33,495 INFO L208 MainTranslator]: Completed translation [2022-02-14 23:22:33,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33 WrapperNode [2022-02-14 23:22:33,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 23:22:33,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 23:22:33,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 23:22:33,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 23:22:33,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 23:22:33,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 23:22:33,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 23:22:33,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 23:22:33,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 23:22:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:33,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 23:22:33,540 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 [2022-02-14 23:22:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 23:22:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 23:22:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 23:22:33,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 23:22:33,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 23:22:33,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 23:22:33,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 23:22:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 23:22:33,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 23:22:33,620 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 23:22:33,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 23:22:33,778 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 23:22:33,782 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 23:22:33,782 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 23:22:33,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:22:33 BoogieIcfgContainer [2022-02-14 23:22:33,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 23:22:33,784 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 23:22:33,784 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 23:22:33,785 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 23:22:33,787 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:22:33" (1/1) ... [2022-02-14 23:22:33,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:22:33 BasicIcfg [2022-02-14 23:22:33,804 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 23:22:33,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 23:22:33,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 23:22:33,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 23:22:33,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:22:33" (1/4) ... [2022-02-14 23:22:33,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6029adf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:22:33, skipping insertion in model container [2022-02-14 23:22:33,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:22:33" (2/4) ... [2022-02-14 23:22:33,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6029adf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:22:33, skipping insertion in model container [2022-02-14 23:22:33,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:22:33" (3/4) ... [2022-02-14 23:22:33,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6029adf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 11:22:33, skipping insertion in model container [2022-02-14 23:22:33,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 11:22:33" (4/4) ... [2022-02-14 23:22:33,811 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.cJordan [2022-02-14 23:22:33,814 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 23:22:33,814 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 23:22:33,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 23:22:33,854 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 [2022-02-14 23:22:33,855 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 23:22:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 23:22:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 23:22:33,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:33,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:33,879 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-02-14 23:22:33,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:33,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077046835] [2022-02-14 23:22:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:22:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:22:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:22:34,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:34,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077046835] [2022-02-14 23:22:34,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077046835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:34,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:34,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 23:22:34,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482286991] [2022-02-14 23:22:34,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:34,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 23:22:34,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 23:22:34,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:22:34,079 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:22:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:34,159 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-02-14 23:22:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 23:22:34,161 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 23:22:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:34,167 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:22:34,167 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 23:22:34,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 23:22:34,171 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:34,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:22:34,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 23:22:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-02-14 23:22:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:22:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-14 23:22:34,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-02-14 23:22:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:34,201 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-14 23:22:34,201 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:22:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-14 23:22:34,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 23:22:34,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:34,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:34,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 23:22:34,202 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-02-14 23:22:34,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:34,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131540704] [2022-02-14 23:22:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:22:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:22:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:22:34,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:34,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131540704] [2022-02-14 23:22:34,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131540704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:34,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:34,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:22:34,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477576934] [2022-02-14 23:22:34,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:34,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:22:34,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:22:34,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:22:34,333 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:22:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:34,493 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-02-14 23:22:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:22:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 23:22:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:34,495 INFO L225 Difference]: With dead ends: 45 [2022-02-14 23:22:34,495 INFO L226 Difference]: Without dead ends: 45 [2022-02-14 23:22:34,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:22:34,499 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:34,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 96 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:22:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-14 23:22:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-14 23:22:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:22:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-02-14 23:22:34,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-02-14 23:22:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:34,515 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-02-14 23:22:34,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 23:22:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-02-14 23:22:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 23:22:34,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:34,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:34,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 23:22:34,518 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-02-14 23:22:34,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:34,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268504395] [2022-02-14 23:22:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:34,528 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:34,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231848239] [2022-02-14 23:22:34,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:34,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:34,544 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) [2022-02-14 23:22:34,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 23:22:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 23:22:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:22:34,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:22:34,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:34,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268504395] [2022-02-14 23:22:34,645 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:34,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231848239] [2022-02-14 23:22:34,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231848239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:34,645 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:34,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 23:22:34,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295145134] [2022-02-14 23:22:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:34,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 23:22:34,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 23:22:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:22:34,647 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:22:34,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:34,654 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-02-14 23:22:34,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 23:22:34,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-14 23:22:34,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:34,655 INFO L225 Difference]: With dead ends: 38 [2022-02-14 23:22:34,655 INFO L226 Difference]: Without dead ends: 38 [2022-02-14 23:22:34,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 23:22:34,656 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:34,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:22:34,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-14 23:22:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-02-14 23:22:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:22:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-02-14 23:22:34,659 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-02-14 23:22:34,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:34,660 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-02-14 23:22:34,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 23:22:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-02-14 23:22:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 23:22:34,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:34,660 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:34,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 23:22:34,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:34,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:34,878 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-02-14 23:22:34,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:34,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592464958] [2022-02-14 23:22:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 23:22:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 23:22:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-14 23:22:34,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 23:22:34,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:34,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592464958] [2022-02-14 23:22:34,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592464958] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:34,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:34,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:22:34,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101739283] [2022-02-14 23:22:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:34,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:22:34,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:34,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:22:34,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:22:34,988 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:22:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:35,095 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-02-14 23:22:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 23:22:35,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-02-14 23:22:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:35,096 INFO L225 Difference]: With dead ends: 50 [2022-02-14 23:22:35,096 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 23:22:35,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:22:35,097 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:35,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 89 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:22:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 23:22:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-02-14 23:22:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 23:22:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-02-14 23:22:35,100 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-02-14 23:22:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:35,101 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-02-14 23:22:35,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 23:22:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-02-14 23:22:35,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-14 23:22:35,101 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:35,101 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:35,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 23:22:35,102 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-02-14 23:22:35,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:35,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075011119] [2022-02-14 23:22:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:35,110 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:35,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4721864] [2022-02-14 23:22:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:35,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:35,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:35,111 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) [2022-02-14 23:22:35,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 23:22:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:22:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 23:22:35,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:22:35,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:35,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075011119] [2022-02-14 23:22:35,209 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:35,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4721864] [2022-02-14 23:22:35,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4721864] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:35,209 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:35,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:22:35,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278678653] [2022-02-14 23:22:35,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:35,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:22:35,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:35,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:22:35,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:22:35,210 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:22:37,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 23:22:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:37,398 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-02-14 23:22:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:22:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-14 23:22:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:37,400 INFO L225 Difference]: With dead ends: 57 [2022-02-14 23:22:37,400 INFO L226 Difference]: Without dead ends: 56 [2022-02-14 23:22:37,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:22:37,401 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:37,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 23:22:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-14 23:22:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-02-14 23:22:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 23:22:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2022-02-14 23:22:37,405 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2022-02-14 23:22:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:37,405 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2022-02-14 23:22:37,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 23:22:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2022-02-14 23:22:37,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 23:22:37,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:37,406 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 23:22:37,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-14 23:22:37,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:37,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-02-14 23:22:37,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:37,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155216496] [2022-02-14 23:22:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:37,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:37,631 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:37,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685234483] [2022-02-14 23:22:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:37,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:37,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:37,633 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) [2022-02-14 23:22:37,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 23:22:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:22:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:22:37,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:22:37,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:37,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155216496] [2022-02-14 23:22:37,791 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:37,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685234483] [2022-02-14 23:22:37,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685234483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:37,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:37,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 23:22:37,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815308908] [2022-02-14 23:22:37,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:37,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 23:22:37,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 23:22:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:22:37,792 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 23:22:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:37,815 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-02-14 23:22:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:22:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-02-14 23:22:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:37,816 INFO L225 Difference]: With dead ends: 69 [2022-02-14 23:22:37,816 INFO L226 Difference]: Without dead ends: 69 [2022-02-14 23:22:37,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 23:22:37,817 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:37,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 23:22:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-14 23:22:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-02-14 23:22:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 23:22:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-02-14 23:22:37,821 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2022-02-14 23:22:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:37,822 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-02-14 23:22:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 23:22:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-02-14 23:22:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-14 23:22:37,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:37,823 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-14 23:22:37,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 23:22:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:38,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-02-14 23:22:38,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:38,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747700006] [2022-02-14 23:22:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:38,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:38,050 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:38,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221148410] [2022-02-14 23:22:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:38,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:38,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:38,065 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) [2022-02-14 23:22:38,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 23:22:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-14 23:22:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:38,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:22:38,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 23:22:38,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:38,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747700006] [2022-02-14 23:22:38,274 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:38,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221148410] [2022-02-14 23:22:38,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221148410] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 23:22:38,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 23:22:38,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 23:22:38,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872139185] [2022-02-14 23:22:38,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:38,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:22:38,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:38,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:22:38,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 23:22:38,276 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:22:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:39,215 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2022-02-14 23:22:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 23:22:39,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-02-14 23:22:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:39,217 INFO L225 Difference]: With dead ends: 80 [2022-02-14 23:22:39,218 INFO L226 Difference]: Without dead ends: 79 [2022-02-14 23:22:39,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:22:39,218 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:39,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-14 23:22:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-14 23:22:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-02-14 23:22:39,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 23:22:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-02-14 23:22:39,224 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2022-02-14 23:22:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:39,224 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-02-14 23:22:39,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-14 23:22:39,224 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-02-14 23:22:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-14 23:22:39,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:39,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 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] [2022-02-14 23:22:39,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 23:22:39,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:39,433 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-02-14 23:22:39,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:39,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642187761] [2022-02-14 23:22:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:39,441 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:39,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773527240] [2022-02-14 23:22:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:39,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:39,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:39,447 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) [2022-02-14 23:22:39,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 23:22:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 23:22:39,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:22:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:22:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 23:22:39,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:39,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642187761] [2022-02-14 23:22:39,714 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:39,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773527240] [2022-02-14 23:22:39,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773527240] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:22:39,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:22:39,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 23:22:39,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889926426] [2022-02-14 23:22:39,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:22:39,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 23:22:39,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 23:22:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 23:22:39,716 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 23:22:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:39,816 INFO L93 Difference]: Finished difference Result 146 states and 174 transitions. [2022-02-14 23:22:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 23:22:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-02-14 23:22:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:39,818 INFO L225 Difference]: With dead ends: 146 [2022-02-14 23:22:39,818 INFO L226 Difference]: Without dead ends: 146 [2022-02-14 23:22:39,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:22:39,819 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 54 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:39,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 248 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 23:22:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-14 23:22:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 138. [2022-02-14 23:22:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 92 states have internal predecessors, (107), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 23:22:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-02-14 23:22:39,835 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 38 [2022-02-14 23:22:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:39,835 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-02-14 23:22:39,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-02-14 23:22:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-02-14 23:22:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-14 23:22:39,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:39,836 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 23:22:39,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 23:22:40,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:40,041 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-02-14 23:22:40,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:40,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699503803] [2022-02-14 23:22:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:40,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:40,048 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:40,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023598865] [2022-02-14 23:22:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:40,052 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) [2022-02-14 23:22:40,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 23:22:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:40,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-14 23:22:40,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:22:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:22:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:22:40,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:40,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699503803] [2022-02-14 23:22:40,703 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:40,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023598865] [2022-02-14 23:22:40,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023598865] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 23:22:40,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 23:22:40,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-02-14 23:22:40,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266285460] [2022-02-14 23:22:40,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 23:22:40,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 23:22:40,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 23:22:40,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-14 23:22:40,705 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 23:22:42,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:22:45,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 23:22:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:45,183 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2022-02-14 23:22:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 23:22:45,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-02-14 23:22:45,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:45,185 INFO L225 Difference]: With dead ends: 160 [2022-02-14 23:22:45,185 INFO L226 Difference]: Without dead ends: 160 [2022-02-14 23:22:45,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-14 23:22:45,186 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 145 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-02-14 23:22:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-14 23:22:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 154. [2022-02-14 23:22:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 104 states have internal predecessors, (118), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-14 23:22:45,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2022-02-14 23:22:45,193 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 46 [2022-02-14 23:22:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:45,194 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2022-02-14 23:22:45,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-02-14 23:22:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2022-02-14 23:22:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 23:22:45,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:45,195 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-02-14 23:22:45,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-14 23:22:45,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:45,422 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:45,423 INFO L85 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2022-02-14 23:22:45,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:45,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101238200] [2022-02-14 23:22:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:45,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:45,439 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:45,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103682395] [2022-02-14 23:22:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:45,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:45,442 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) [2022-02-14 23:22:45,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 23:22:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 23:22:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 23:22:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 23:22:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 23:22:45,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 23:22:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-14 23:22:45,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 23:22:45,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101238200] [2022-02-14 23:22:45,765 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 23:22:45,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103682395] [2022-02-14 23:22:45,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103682395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 23:22:45,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 23:22:45,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 23:22:45,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599184188] [2022-02-14 23:22:45,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 23:22:45,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 23:22:45,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 23:22:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 23:22:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 23:22:45,769 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-14 23:22:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 23:22:46,001 INFO L93 Difference]: Finished difference Result 257 states and 309 transitions. [2022-02-14 23:22:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 23:22:46,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 50 [2022-02-14 23:22:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 23:22:46,012 INFO L225 Difference]: With dead ends: 257 [2022-02-14 23:22:46,012 INFO L226 Difference]: Without dead ends: 257 [2022-02-14 23:22:46,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 23:22:46,013 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 102 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 23:22:46,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 250 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 23:22:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-14 23:22:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2022-02-14 23:22:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 160 states have (on average 1.2) internal successors, (192), 172 states have internal predecessors, (192), 59 states have call successors, (59), 31 states have call predecessors, (59), 30 states have return successors, (54), 46 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-14 23:22:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 305 transitions. [2022-02-14 23:22:46,040 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 305 transitions. Word has length 50 [2022-02-14 23:22:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 23:22:46,040 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 305 transitions. [2022-02-14 23:22:46,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 8 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-14 23:22:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 305 transitions. [2022-02-14 23:22:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 23:22:46,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 23:22:46,042 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-02-14 23:22:46,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 23:22:46,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:46,265 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 23:22:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 23:22:46,266 INFO L85 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2022-02-14 23:22:46,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 23:22:46,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186792963] [2022-02-14 23:22:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 23:22:46,273 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 23:22:46,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635881897] [2022-02-14 23:22:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 23:22:46,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 23:22:46,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 23:22:46,274 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) [2022-02-14 23:22:46,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process