/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/fermat1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:57,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:57,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:57,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:22:57,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:22:57,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:22:57,732 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:22:57,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:22:57,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:22:57,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:22:57,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:22:57,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:22:57,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:57,739 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:57,740 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:57,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:57,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:57,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:57,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:57,745 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:57,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:57,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:57,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:57,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:57,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:57,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:57,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:57,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:57,781 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:57,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:57,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:57,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:57,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:57,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:57,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:57,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:57,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:57,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:57,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:57,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:57,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:57,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:57,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:57,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:57,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:57,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:57,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:57,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:57,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:57,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:57,800 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:57,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:58,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:58,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:58,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:58,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:58,109 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:58,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-05-06 08:22:58,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8c86360/8bfc8f2b79ab40a59e5783be5abfa287/FLAG98875ae9b [2021-05-06 08:22:58,568 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:58,569 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-05-06 08:22:58,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8c86360/8bfc8f2b79ab40a59e5783be5abfa287/FLAG98875ae9b [2021-05-06 08:22:58,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f8c86360/8bfc8f2b79ab40a59e5783be5abfa287 [2021-05-06 08:22:58,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:58,607 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:58,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:58,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:58,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:58,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e72445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58, skipping insertion in model container [2021-05-06 08:22:58,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:58,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:58,787 WARN L224 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/fermat1-ll_unwindbound10.c[535,548] [2021-05-06 08:22:58,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:58,826 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:58,843 WARN L224 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/fermat1-ll_unwindbound10.c[535,548] [2021-05-06 08:22:58,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:58,908 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:58,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58 WrapperNode [2021-05-06 08:22:58,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:58,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:58,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:58,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:58,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... [2021-05-06 08:22:58,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:58,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:58,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:58,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:58,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:59,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:59,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:59,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:59,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:59,319 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:59,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:59 BoogieIcfgContainer [2021-05-06 08:22:59,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:59,338 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:59,338 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:59,339 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:59,341 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:59" (1/1) ... [2021-05-06 08:22:59,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:59 BasicIcfg [2021-05-06 08:22:59,372 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:59,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:59,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:59,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:59,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:58" (1/4) ... [2021-05-06 08:22:59,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e746f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:59, skipping insertion in model container [2021-05-06 08:22:59,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:58" (2/4) ... [2021-05-06 08:22:59,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e746f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:59, skipping insertion in model container [2021-05-06 08:22:59,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:59" (3/4) ... [2021-05-06 08:22:59,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e746f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:59, skipping insertion in model container [2021-05-06 08:22:59,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:59" (4/4) ... [2021-05-06 08:22:59,379 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.cJordan [2021-05-06 08:22:59,383 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:59,403 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:59,418 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:59,433 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:59,434 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:59,434 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:59,434 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:59,434 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:59,434 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:59,434 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:59,434 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:59,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:22:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 08:22:59,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:59,456 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:59,456 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -758992103, now seen corresponding path program 1 times [2021-05-06 08:22:59,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:59,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363425] [2021-05-06 08:22:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:59,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:59,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029962815] [2021-05-06 08:22:59,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:59,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:22:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 08:22:59,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:59,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363425] [2021-05-06 08:22:59,803 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:59,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029962815] [2021-05-06 08:22:59,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029962815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:59,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:59,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:22:59,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852691693] [2021-05-06 08:22:59,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:22:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:22:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:22:59,825 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:59,840 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 08:22:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:22:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 08:22:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:59,848 INFO L225 Difference]: With dead ends: 37 [2021-05-06 08:22:59,848 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 08:22:59,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:22:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 08:22:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 08:22:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:22:59,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 08:22:59,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 22 [2021-05-06 08:22:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:59,884 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 08:22:59,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:22:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 08:22:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:22:59,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:59,887 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:00,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:23:00,105 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -713449777, now seen corresponding path program 1 times [2021-05-06 08:23:00,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:00,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660995105] [2021-05-06 08:23:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:00,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:00,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105999690] [2021-05-06 08:23:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:00,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:23:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:00,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660995105] [2021-05-06 08:23:00,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:00,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105999690] [2021-05-06 08:23:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105999690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622097996] [2021-05-06 08:23:00,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:00,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:00,327 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:23:00,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:00,342 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-05-06 08:23:00,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:00,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:23:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:00,344 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:23:00,344 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:23:00,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:23:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:23:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:23:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-06 08:23:00,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2021-05-06 08:23:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:00,351 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-06 08:23:00,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:23:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-06 08:23:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:23:00,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:00,352 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:00,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:00,569 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:00,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:00,570 INFO L82 PathProgramCache]: Analyzing trace with hash -712377301, now seen corresponding path program 1 times [2021-05-06 08:23:00,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:00,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327256109] [2021-05-06 08:23:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:00,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:00,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136068675] [2021-05-06 08:23:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:00,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:00,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:00,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:00,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327256109] [2021-05-06 08:23:00,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:00,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136068675] [2021-05-06 08:23:00,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136068675] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:00,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:00,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:00,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297638097] [2021-05-06 08:23:00,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:00,870 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:23:10,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:10,132 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2021-05-06 08:23:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:10,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 08:23:10,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:10,134 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:23:10,134 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:23:10,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:23:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:23:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:23:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2021-05-06 08:23:10,142 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 23 [2021-05-06 08:23:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:10,142 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2021-05-06 08:23:10,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 08:23:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2021-05-06 08:23:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 08:23:10,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:10,143 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:10,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:10,344 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 740915101, now seen corresponding path program 1 times [2021-05-06 08:23:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403849322] [2021-05-06 08:23:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:10,358 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:10,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779974493] [2021-05-06 08:23:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:23:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:10,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403849322] [2021-05-06 08:23:10,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:10,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779974493] [2021-05-06 08:23:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779974493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:10,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154071921] [2021-05-06 08:23:10,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:10,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:10,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:10,602 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:23:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:10,728 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-05-06 08:23:10,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 08:23:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:10,732 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:23:10,733 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 08:23:10,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 08:23:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 08:23:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:23:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-05-06 08:23:10,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 29 [2021-05-06 08:23:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:10,752 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-05-06 08:23:10,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 08:23:10,752 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-05-06 08:23:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:23:10,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:10,753 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:10,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:10,955 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1345250901, now seen corresponding path program 1 times [2021-05-06 08:23:10,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:10,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801013704] [2021-05-06 08:23:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:10,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:10,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738943786] [2021-05-06 08:23:10,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:23:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:11,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801013704] [2021-05-06 08:23:11,143 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738943786] [2021-05-06 08:23:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738943786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:11,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:11,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:23:11,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485494137] [2021-05-06 08:23:11,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:23:11,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:23:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:11,145 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:23:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:11,178 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 08:23:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:11,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-06 08:23:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:11,179 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:23:11,179 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:23:11,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:23:11,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 08:23:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:23:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-06 08:23:11,185 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 35 [2021-05-06 08:23:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:11,185 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-06 08:23:11,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:23:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-06 08:23:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:23:11,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:11,187 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:11,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:11,410 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:11,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:11,411 INFO L82 PathProgramCache]: Analyzing trace with hash -516919762, now seen corresponding path program 1 times [2021-05-06 08:23:11,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:11,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521605986] [2021-05-06 08:23:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:11,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:11,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586007440] [2021-05-06 08:23:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:11,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:11,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:11,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:11,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521605986] [2021-05-06 08:23:11,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:11,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586007440] [2021-05-06 08:23:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586007440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:11,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:11,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606993691] [2021-05-06 08:23:11,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:11,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:11,608 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:23:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:11,660 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2021-05-06 08:23:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:23:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 08:23:11,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:11,666 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:23:11,666 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:23:11,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:23:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:23:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:23:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-05-06 08:23:11,680 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 41 [2021-05-06 08:23:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:11,681 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-05-06 08:23:11,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:23:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-05-06 08:23:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:23:11,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:11,682 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:11,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:11,906 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash -61650990, now seen corresponding path program 1 times [2021-05-06 08:23:11,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:11,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744596937] [2021-05-06 08:23:11,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:11,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:11,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287937224] [2021-05-06 08:23:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:12,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:23:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:12,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:12,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744596937] [2021-05-06 08:23:12,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287937224] [2021-05-06 08:23:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287937224] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:23:12,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110625708] [2021-05-06 08:23:12,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:23:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:12,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:23:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:23:12,159 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:23:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:12,211 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2021-05-06 08:23:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:23:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2021-05-06 08:23:12,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:12,212 INFO L225 Difference]: With dead ends: 70 [2021-05-06 08:23:12,212 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 08:23:12,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 08:23:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 08:23:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:23:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2021-05-06 08:23:12,218 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 43 [2021-05-06 08:23:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:12,218 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2021-05-06 08:23:12,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 08:23:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2021-05-06 08:23:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:23:12,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:12,219 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:12,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:12,429 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:12,429 INFO L82 PathProgramCache]: Analyzing trace with hash 468355249, now seen corresponding path program 1 times [2021-05-06 08:23:12,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:12,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901262145] [2021-05-06 08:23:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:12,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:12,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964536978] [2021-05-06 08:23:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:23:12,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:12,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901262145] [2021-05-06 08:23:12,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964536978] [2021-05-06 08:23:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964536978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:12,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:12,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:12,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367639271] [2021-05-06 08:23:12,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:12,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:12,584 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:23:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:12,613 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2021-05-06 08:23:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-06 08:23:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:12,615 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:23:12,615 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:23:12,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:23:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-05-06 08:23:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 states have internal predecessors, (90), 20 states have call successors, (20), 8 states have call predecessors, (20), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:23:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2021-05-06 08:23:12,626 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 47 [2021-05-06 08:23:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:12,628 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2021-05-06 08:23:12,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:23:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2021-05-06 08:23:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 08:23:12,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:12,629 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:12,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:23:12,830 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:12,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash -763492839, now seen corresponding path program 1 times [2021-05-06 08:23:12,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:12,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441442100] [2021-05-06 08:23:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:12,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:12,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015161108] [2021-05-06 08:23:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:12,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:12,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:12,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:13,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:13,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441442100] [2021-05-06 08:23:13,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:13,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015161108] [2021-05-06 08:23:13,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015161108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:13,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:13,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:13,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657152766] [2021-05-06 08:23:13,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:13,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:13,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:13,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:13,004 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:23:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:13,078 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2021-05-06 08:23:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:23:13,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-05-06 08:23:13,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:13,080 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:23:13,080 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:23:13,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:23:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:23:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 83 states have internal predecessors, (103), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:23:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 145 transitions. [2021-05-06 08:23:13,087 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 145 transitions. Word has length 49 [2021-05-06 08:23:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:13,087 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 145 transitions. [2021-05-06 08:23:13,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:23:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 145 transitions. [2021-05-06 08:23:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:23:13,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:13,088 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:13,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:13,312 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1993056519, now seen corresponding path program 2 times [2021-05-06 08:23:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480451121] [2021-05-06 08:23:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:13,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:13,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372858732] [2021-05-06 08:23:13,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:13,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:13,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:13,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:23:13,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:13,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:13,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480451121] [2021-05-06 08:23:13,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:13,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372858732] [2021-05-06 08:23:13,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372858732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:13,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:13,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:23:13,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184953305] [2021-05-06 08:23:13,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:23:13,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:23:13,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:23:13,549 INFO L87 Difference]: Start difference. First operand 114 states and 145 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:23:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:13,613 INFO L93 Difference]: Finished difference Result 116 states and 147 transitions. [2021-05-06 08:23:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:13,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2021-05-06 08:23:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:13,614 INFO L225 Difference]: With dead ends: 116 [2021-05-06 08:23:13,615 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 08:23:13,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 08:23:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-06 08:23:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.2352941176470589) internal successors, (105), 85 states have internal predecessors, (105), 22 states have call successors, (22), 10 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:23:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2021-05-06 08:23:13,620 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 51 [2021-05-06 08:23:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:13,620 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2021-05-06 08:23:13,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 08:23:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2021-05-06 08:23:13,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:23:13,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:13,622 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:13,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:13,846 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2076394588, now seen corresponding path program 1 times [2021-05-06 08:23:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:13,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817401462] [2021-05-06 08:23:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:13,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:13,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097675517] [2021-05-06 08:23:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:13,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:13,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:13,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:14,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:14,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817401462] [2021-05-06 08:23:14,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:14,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097675517] [2021-05-06 08:23:14,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097675517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:14,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:14,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:14,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070270203] [2021-05-06 08:23:14,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:14,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:14,072 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:14,151 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2021-05-06 08:23:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:23:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2021-05-06 08:23:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:14,152 INFO L225 Difference]: With dead ends: 137 [2021-05-06 08:23:14,152 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 08:23:14,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:14,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 08:23:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-05-06 08:23:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 97 states have (on average 1.2268041237113403) internal successors, (119), 98 states have internal predecessors, (119), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2021-05-06 08:23:14,159 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 55 [2021-05-06 08:23:14,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:14,159 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2021-05-06 08:23:14,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2021-05-06 08:23:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 08:23:14,160 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:14,161 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:14,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:23:14,373 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:14,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1625914620, now seen corresponding path program 2 times [2021-05-06 08:23:14,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:14,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726426984] [2021-05-06 08:23:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:14,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:14,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593817028] [2021-05-06 08:23:14,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:14,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:14,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:14,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:14,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:14,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:14,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726426984] [2021-05-06 08:23:14,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:14,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593817028] [2021-05-06 08:23:14,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593817028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:14,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:14,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:14,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728130442] [2021-05-06 08:23:14,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:14,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:14,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:14,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:14,575 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:14,666 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2021-05-06 08:23:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:23:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 57 [2021-05-06 08:23:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:14,668 INFO L225 Difference]: With dead ends: 139 [2021-05-06 08:23:14,668 INFO L226 Difference]: Without dead ends: 139 [2021-05-06 08:23:14,668 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-06 08:23:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-05-06 08:23:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 173 transitions. [2021-05-06 08:23:14,674 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 173 transitions. Word has length 57 [2021-05-06 08:23:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:14,674 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 173 transitions. [2021-05-06 08:23:14,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 173 transitions. [2021-05-06 08:23:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:23:14,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:14,675 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:14,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:14,889 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1635475232, now seen corresponding path program 3 times [2021-05-06 08:23:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:14,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628877067] [2021-05-06 08:23:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:14,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:14,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241310667] [2021-05-06 08:23:14,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:15,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 08:23:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:23:15,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:15,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:15,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628877067] [2021-05-06 08:23:15,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241310667] [2021-05-06 08:23:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241310667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:15,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:15,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:23:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442922439] [2021-05-06 08:23:15,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:23:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:23:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:23:15,184 INFO L87 Difference]: Start difference. First operand 138 states and 173 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:15,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:15,276 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2021-05-06 08:23:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 08:23:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:15,278 INFO L225 Difference]: With dead ends: 140 [2021-05-06 08:23:15,278 INFO L226 Difference]: Without dead ends: 140 [2021-05-06 08:23:15,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-06 08:23:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-05-06 08:23:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 104 states have internal predecessors, (127), 25 states have call successors, (25), 12 states have call predecessors, (25), 10 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 08:23:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2021-05-06 08:23:15,283 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 59 [2021-05-06 08:23:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:15,283 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2021-05-06 08:23:15,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 08:23:15,284 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2021-05-06 08:23:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 08:23:15,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:15,285 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:15,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:23:15,505 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:15,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1972951801, now seen corresponding path program 2 times [2021-05-06 08:23:15,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:15,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053012782] [2021-05-06 08:23:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:15,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:15,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074630896] [2021-05-06 08:23:15,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:15,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:15,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:15,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053012782] [2021-05-06 08:23:15,721 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074630896] [2021-05-06 08:23:15,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074630896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:15,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:15,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:15,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681512370] [2021-05-06 08:23:15,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:15,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:15,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:15,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:15,723 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:15,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:15,820 INFO L93 Difference]: Finished difference Result 167 states and 208 transitions. [2021-05-06 08:23:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:23:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 63 [2021-05-06 08:23:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:15,822 INFO L225 Difference]: With dead ends: 167 [2021-05-06 08:23:15,822 INFO L226 Difference]: Without dead ends: 167 [2021-05-06 08:23:15,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-06 08:23:15,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 159. [2021-05-06 08:23:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 116 states have (on average 1.2155172413793103) internal successors, (141), 119 states have internal predecessors, (141), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:23:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 199 transitions. [2021-05-06 08:23:15,828 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 199 transitions. Word has length 63 [2021-05-06 08:23:15,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:15,828 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 199 transitions. [2021-05-06 08:23:15,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:15,828 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 199 transitions. [2021-05-06 08:23:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 08:23:15,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:15,829 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:16,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:16,045 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1807424273, now seen corresponding path program 3 times [2021-05-06 08:23:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:16,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259293081] [2021-05-06 08:23:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:16,054 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:16,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87801488] [2021-05-06 08:23:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:16,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:16,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:16,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:16,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259293081] [2021-05-06 08:23:16,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:16,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87801488] [2021-05-06 08:23:16,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87801488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:16,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:16,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664283148] [2021-05-06 08:23:16,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:16,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:16,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:16,707 INFO L87 Difference]: Start difference. First operand 159 states and 199 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:16,818 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2021-05-06 08:23:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:23:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 65 [2021-05-06 08:23:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:16,820 INFO L225 Difference]: With dead ends: 169 [2021-05-06 08:23:16,820 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 08:23:16,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 08:23:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2021-05-06 08:23:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 123 states have internal predecessors, (147), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:23:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 205 transitions. [2021-05-06 08:23:16,829 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 205 transitions. Word has length 65 [2021-05-06 08:23:16,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:16,829 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 205 transitions. [2021-05-06 08:23:16,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 205 transitions. [2021-05-06 08:23:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:23:16,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:16,831 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:17,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:23:17,038 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash 32887736, now seen corresponding path program 1 times [2021-05-06 08:23:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:17,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888330791] [2021-05-06 08:23:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:17,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:17,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843516559] [2021-05-06 08:23:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:23:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:17,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:17,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:17,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888330791] [2021-05-06 08:23:17,253 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:17,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843516559] [2021-05-06 08:23:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843516559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:17,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:17,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:23:17,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127457206] [2021-05-06 08:23:17,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:23:17,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:23:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:23:17,255 INFO L87 Difference]: Start difference. First operand 164 states and 205 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:17,384 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2021-05-06 08:23:17,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:17,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2021-05-06 08:23:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:17,385 INFO L225 Difference]: With dead ends: 172 [2021-05-06 08:23:17,385 INFO L226 Difference]: Without dead ends: 172 [2021-05-06 08:23:17,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:17,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-06 08:23:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-05-06 08:23:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 129 states have internal predecessors, (155), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 08:23:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2021-05-06 08:23:17,391 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 67 [2021-05-06 08:23:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:17,392 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2021-05-06 08:23:17,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 08:23:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2021-05-06 08:23:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 08:23:17,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:17,393 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:17,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:23:17,617 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash 820062898, now seen corresponding path program 3 times [2021-05-06 08:23:17,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:17,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802030604] [2021-05-06 08:23:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:17,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:17,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963934163] [2021-05-06 08:23:17,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:17,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:17,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:17,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:17,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:17,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:17,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:17,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802030604] [2021-05-06 08:23:17,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:17,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963934163] [2021-05-06 08:23:17,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963934163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:17,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:17,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:17,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173125160] [2021-05-06 08:23:17,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:17,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:17,994 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:18,172 INFO L93 Difference]: Finished difference Result 205 states and 256 transitions. [2021-05-06 08:23:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:23:18,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2021-05-06 08:23:18,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:18,174 INFO L225 Difference]: With dead ends: 205 [2021-05-06 08:23:18,174 INFO L226 Difference]: Without dead ends: 205 [2021-05-06 08:23:18,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-06 08:23:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2021-05-06 08:23:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 141 states have (on average 1.198581560283688) internal successors, (169), 146 states have internal predecessors, (169), 37 states have call successors, (37), 16 states have call predecessors, (37), 14 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 08:23:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 241 transitions. [2021-05-06 08:23:18,181 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 241 transitions. Word has length 71 [2021-05-06 08:23:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:18,182 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 241 transitions. [2021-05-06 08:23:18,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 241 transitions. [2021-05-06 08:23:18,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:18,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:18,184 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:18,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:23:18,397 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -15553925, now seen corresponding path program 1 times [2021-05-06 08:23:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:18,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612646177] [2021-05-06 08:23:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:18,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:18,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876660237] [2021-05-06 08:23:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:18,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-05-06 08:23:18,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:18,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612646177] [2021-05-06 08:23:18,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:18,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876660237] [2021-05-06 08:23:18,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876660237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:18,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:18,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:18,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867813284] [2021-05-06 08:23:18,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:18,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:18,576 INFO L87 Difference]: Start difference. First operand 193 states and 241 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:18,600 INFO L93 Difference]: Finished difference Result 227 states and 291 transitions. [2021-05-06 08:23:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:18,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 73 [2021-05-06 08:23:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:18,603 INFO L225 Difference]: With dead ends: 227 [2021-05-06 08:23:18,603 INFO L226 Difference]: Without dead ends: 227 [2021-05-06 08:23:18,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-06 08:23:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 211. [2021-05-06 08:23:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 160 states have internal predecessors, (189), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:23:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 269 transitions. [2021-05-06 08:23:18,619 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 269 transitions. Word has length 73 [2021-05-06 08:23:18,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:18,619 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 269 transitions. [2021-05-06 08:23:18,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:18,619 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 269 transitions. [2021-05-06 08:23:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:23:18,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:18,621 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:18,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:23:18,845 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2074858534, now seen corresponding path program 4 times [2021-05-06 08:23:18,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:18,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047404043] [2021-05-06 08:23:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:18,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:18,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127426348] [2021-05-06 08:23:18,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:18,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:18,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:18,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:18,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:18,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:19,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:19,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047404043] [2021-05-06 08:23:19,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:19,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127426348] [2021-05-06 08:23:19,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127426348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:19,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:19,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:19,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360418378] [2021-05-06 08:23:19,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:19,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:19,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:19,097 INFO L87 Difference]: Start difference. First operand 211 states and 269 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:19,245 INFO L93 Difference]: Finished difference Result 222 states and 281 transitions. [2021-05-06 08:23:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:23:19,245 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 73 [2021-05-06 08:23:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:19,247 INFO L225 Difference]: With dead ends: 222 [2021-05-06 08:23:19,247 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:23:19,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:23:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:23:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2021-05-06 08:23:19,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 160 states have (on average 1.21875) internal successors, (195), 164 states have internal predecessors, (195), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (39), 35 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:23:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2021-05-06 08:23:19,255 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 73 [2021-05-06 08:23:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:19,255 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2021-05-06 08:23:19,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2021-05-06 08:23:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 08:23:19,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:19,256 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:19,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:19,473 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:19,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:19,473 INFO L82 PathProgramCache]: Analyzing trace with hash 714581215, now seen corresponding path program 1 times [2021-05-06 08:23:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:19,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718397049] [2021-05-06 08:23:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:19,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:19,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303074628] [2021-05-06 08:23:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:19,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:23:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:19,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:19,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718397049] [2021-05-06 08:23:19,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:19,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303074628] [2021-05-06 08:23:19,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303074628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:19,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:19,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:23:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205387133] [2021-05-06 08:23:19,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:23:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:23:19,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:23:19,720 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:19,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:19,863 INFO L93 Difference]: Finished difference Result 225 states and 284 transitions. [2021-05-06 08:23:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:19,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 75 [2021-05-06 08:23:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:19,865 INFO L225 Difference]: With dead ends: 225 [2021-05-06 08:23:19,865 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 08:23:19,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 08:23:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-05-06 08:23:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 168 states have internal predecessors, (201), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:23:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 281 transitions. [2021-05-06 08:23:19,871 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 281 transitions. Word has length 75 [2021-05-06 08:23:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:19,872 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 281 transitions. [2021-05-06 08:23:19,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 08:23:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 281 transitions. [2021-05-06 08:23:19,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:23:19,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:19,873 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:20,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:20,089 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash 490493277, now seen corresponding path program 4 times [2021-05-06 08:23:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294045844] [2021-05-06 08:23:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:20,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:20,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366275452] [2021-05-06 08:23:20,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:20,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:20,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:20,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:20,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:20,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294045844] [2021-05-06 08:23:20,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:20,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366275452] [2021-05-06 08:23:20,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366275452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:20,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:20,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:20,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608364974] [2021-05-06 08:23:20,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:20,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:20,453 INFO L87 Difference]: Start difference. First operand 222 states and 281 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:20,618 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2021-05-06 08:23:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:23:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 79 [2021-05-06 08:23:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:20,620 INFO L225 Difference]: With dead ends: 251 [2021-05-06 08:23:20,620 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 08:23:20,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:23:20,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 08:23:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 242. [2021-05-06 08:23:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 178 states have (on average 1.2078651685393258) internal successors, (215), 184 states have internal predecessors, (215), 47 states have call successors, (47), 18 states have call predecessors, (47), 16 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:23:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 307 transitions. [2021-05-06 08:23:20,627 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 307 transitions. Word has length 79 [2021-05-06 08:23:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:20,628 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 307 transitions. [2021-05-06 08:23:20,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 307 transitions. [2021-05-06 08:23:20,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 08:23:20,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:20,629 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:20,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:23:20,853 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:20,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:20,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1885782626, now seen corresponding path program 1 times [2021-05-06 08:23:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:20,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132023354] [2021-05-06 08:23:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:20,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:20,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177973517] [2021-05-06 08:23:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:20,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:20,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:20,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:21,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:21,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132023354] [2021-05-06 08:23:21,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:21,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177973517] [2021-05-06 08:23:21,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177973517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:21,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:21,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804030119] [2021-05-06 08:23:21,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:21,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:21,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:21,123 INFO L87 Difference]: Start difference. First operand 242 states and 307 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:21,292 INFO L93 Difference]: Finished difference Result 253 states and 319 transitions. [2021-05-06 08:23:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:23:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2021-05-06 08:23:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:21,295 INFO L225 Difference]: With dead ends: 253 [2021-05-06 08:23:21,295 INFO L226 Difference]: Without dead ends: 253 [2021-05-06 08:23:21,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:23:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-06 08:23:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2021-05-06 08:23:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 183 states have (on average 1.2076502732240437) internal successors, (221), 188 states have internal predecessors, (221), 47 states have call successors, (47), 18 states have call predecessors, (47), 16 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:23:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 313 transitions. [2021-05-06 08:23:21,303 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 313 transitions. Word has length 81 [2021-05-06 08:23:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:21,303 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 313 transitions. [2021-05-06 08:23:21,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 313 transitions. [2021-05-06 08:23:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:23:21,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:21,305 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:21,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:21,530 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1757061370, now seen corresponding path program 2 times [2021-05-06 08:23:21,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:21,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711547665] [2021-05-06 08:23:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:21,537 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:21,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892424961] [2021-05-06 08:23:21,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:21,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:21,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:21,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:23:21,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:21,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711547665] [2021-05-06 08:23:21,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:21,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892424961] [2021-05-06 08:23:21,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892424961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:21,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:21,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:23:21,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617280881] [2021-05-06 08:23:21,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:23:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:23:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:23:21,794 INFO L87 Difference]: Start difference. First operand 247 states and 313 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:21,986 INFO L93 Difference]: Finished difference Result 256 states and 322 transitions. [2021-05-06 08:23:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 83 [2021-05-06 08:23:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:21,988 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:23:21,988 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:23:21,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:23:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2021-05-06 08:23:21,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 189 states have (on average 1.2010582010582012) internal successors, (227), 192 states have internal predecessors, (227), 47 states have call successors, (47), 18 states have call predecessors, (47), 16 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 08:23:21,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 319 transitions. [2021-05-06 08:23:21,995 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 319 transitions. Word has length 83 [2021-05-06 08:23:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:21,996 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 319 transitions. [2021-05-06 08:23:21,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 08:23:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 319 transitions. [2021-05-06 08:23:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:23:21,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:21,997 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:22,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:23:22,221 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 886433253, now seen corresponding path program 1 times [2021-05-06 08:23:22,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:22,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227379494] [2021-05-06 08:23:22,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:22,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:22,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589367766] [2021-05-06 08:23:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:22,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:23:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:22,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 16 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:22,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227379494] [2021-05-06 08:23:22,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:22,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589367766] [2021-05-06 08:23:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589367766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200854781] [2021-05-06 08:23:22,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:22,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:22,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:22,501 INFO L87 Difference]: Start difference. First operand 253 states and 319 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:22,703 INFO L93 Difference]: Finished difference Result 282 states and 355 transitions. [2021-05-06 08:23:22,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:23:22,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 87 [2021-05-06 08:23:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:22,705 INFO L225 Difference]: With dead ends: 282 [2021-05-06 08:23:22,705 INFO L226 Difference]: Without dead ends: 282 [2021-05-06 08:23:22,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:23:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-06 08:23:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 273. [2021-05-06 08:23:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 201 states have (on average 1.199004975124378) internal successors, (241), 208 states have internal predecessors, (241), 53 states have call successors, (53), 20 states have call predecessors, (53), 18 states have return successors, (51), 44 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 08:23:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 345 transitions. [2021-05-06 08:23:22,714 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 345 transitions. Word has length 87 [2021-05-06 08:23:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:22,714 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 345 transitions. [2021-05-06 08:23:22,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 345 transitions. [2021-05-06 08:23:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:22,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:22,715 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:22,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:22,930 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1577510477, now seen corresponding path program 2 times [2021-05-06 08:23:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:22,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676316549] [2021-05-06 08:23:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:22,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:22,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630741305] [2021-05-06 08:23:22,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:23,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:23,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-06 08:23:23,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:23,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676316549] [2021-05-06 08:23:23,162 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:23,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630741305] [2021-05-06 08:23:23,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630741305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:23,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:23,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 08:23:23,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309675008] [2021-05-06 08:23:23,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:23,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:23,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:23,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:23,164 INFO L87 Difference]: Start difference. First operand 273 states and 345 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:23,211 INFO L93 Difference]: Finished difference Result 331 states and 425 transitions. [2021-05-06 08:23:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:23:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 89 [2021-05-06 08:23:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:23,214 INFO L225 Difference]: With dead ends: 331 [2021-05-06 08:23:23,214 INFO L226 Difference]: Without dead ends: 329 [2021-05-06 08:23:23,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:23:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-05-06 08:23:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2021-05-06 08:23:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 240 states have (on average 1.2) internal successors, (288), 246 states have internal predecessors, (288), 65 states have call successors, (65), 20 states have call predecessors, (65), 18 states have return successors, (63), 57 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 416 transitions. [2021-05-06 08:23:23,227 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 416 transitions. Word has length 89 [2021-05-06 08:23:23,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:23,227 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 416 transitions. [2021-05-06 08:23:23,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 416 transitions. [2021-05-06 08:23:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:23:23,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:23,229 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:23,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:23:23,434 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:23,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1031013193, now seen corresponding path program 3 times [2021-05-06 08:23:23,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:23,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875813486] [2021-05-06 08:23:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:23,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:23,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550946083] [2021-05-06 08:23:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:23,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:23,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:23,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:23,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 20 proven. 148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:23,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:23,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875813486] [2021-05-06 08:23:23,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:23,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550946083] [2021-05-06 08:23:23,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550946083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:23,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:23,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:23,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899502560] [2021-05-06 08:23:23,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:23,790 INFO L87 Difference]: Start difference. First operand 324 states and 416 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:23,998 INFO L93 Difference]: Finished difference Result 340 states and 434 transitions. [2021-05-06 08:23:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:23:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 89 [2021-05-06 08:23:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:24,000 INFO L225 Difference]: With dead ends: 340 [2021-05-06 08:23:24,000 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 08:23:24,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:23:24,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 08:23:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 332. [2021-05-06 08:23:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 248 states have (on average 1.2016129032258065) internal successors, (298), 252 states have internal predecessors, (298), 65 states have call successors, (65), 20 states have call predecessors, (65), 18 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 426 transitions. [2021-05-06 08:23:24,008 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 426 transitions. Word has length 89 [2021-05-06 08:23:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:24,008 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 426 transitions. [2021-05-06 08:23:24,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 11 states have internal predecessors, (62), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 426 transitions. [2021-05-06 08:23:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:23:24,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:24,010 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:24,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:23:24,216 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1443234349, now seen corresponding path program 3 times [2021-05-06 08:23:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:24,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949136802] [2021-05-06 08:23:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:24,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:24,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361076891] [2021-05-06 08:23:24,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:24,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 08:23:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:24,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:23:24,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:24,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:24,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949136802] [2021-05-06 08:23:24,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361076891] [2021-05-06 08:23:24,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361076891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:24,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:24,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:23:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841745730] [2021-05-06 08:23:24,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:23:24,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:23:24,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:23:24,614 INFO L87 Difference]: Start difference. First operand 332 states and 426 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:24,821 INFO L93 Difference]: Finished difference Result 344 states and 438 transitions. [2021-05-06 08:23:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 91 [2021-05-06 08:23:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:24,823 INFO L225 Difference]: With dead ends: 344 [2021-05-06 08:23:24,823 INFO L226 Difference]: Without dead ends: 344 [2021-05-06 08:23:24,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:24,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-05-06 08:23:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-05-06 08:23:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 260 states have (on average 1.1923076923076923) internal successors, (310), 260 states have internal predecessors, (310), 65 states have call successors, (65), 20 states have call predecessors, (65), 18 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 08:23:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 438 transitions. [2021-05-06 08:23:24,831 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 438 transitions. Word has length 91 [2021-05-06 08:23:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:24,831 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 438 transitions. [2021-05-06 08:23:24,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 08:23:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 438 transitions. [2021-05-06 08:23:24,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 08:23:24,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:24,833 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:25,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:23:25,039 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:25,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:25,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1900896884, now seen corresponding path program 2 times [2021-05-06 08:23:25,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:25,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887518380] [2021-05-06 08:23:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:25,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:25,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262653874] [2021-05-06 08:23:25,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:25,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:23:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:25,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:25,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:25,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 188 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:25,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887518380] [2021-05-06 08:23:25,352 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:25,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262653874] [2021-05-06 08:23:25,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262653874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:25,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:25,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:25,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713445671] [2021-05-06 08:23:25,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:25,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:25,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:25,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:25,353 INFO L87 Difference]: Start difference. First operand 344 states and 438 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:25,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:25,616 INFO L93 Difference]: Finished difference Result 381 states and 486 transitions. [2021-05-06 08:23:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:23:25,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 95 [2021-05-06 08:23:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:25,618 INFO L225 Difference]: With dead ends: 381 [2021-05-06 08:23:25,618 INFO L226 Difference]: Without dead ends: 381 [2021-05-06 08:23:25,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:23:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-06 08:23:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 368. [2021-05-06 08:23:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 273 states have (on average 1.1904761904761905) internal successors, (325), 279 states have internal predecessors, (325), 74 states have call successors, (74), 22 states have call predecessors, (74), 20 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 471 transitions. [2021-05-06 08:23:25,626 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 471 transitions. Word has length 95 [2021-05-06 08:23:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:25,627 INFO L480 AbstractCegarLoop]: Abstraction has 368 states and 471 transitions. [2021-05-06 08:23:25,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 12 states have internal predecessors, (66), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 471 transitions. [2021-05-06 08:23:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:23:25,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:25,628 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:25,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:23:25,834 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1282125772, now seen corresponding path program 4 times [2021-05-06 08:23:25,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:25,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213537665] [2021-05-06 08:23:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:25,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:25,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997381560] [2021-05-06 08:23:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:25,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:25,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:25,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:25,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:26,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213537665] [2021-05-06 08:23:26,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997381560] [2021-05-06 08:23:26,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997381560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:26,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:26,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:26,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293093337] [2021-05-06 08:23:26,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:26,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:26,211 INFO L87 Difference]: Start difference. First operand 368 states and 471 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:26,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,441 INFO L93 Difference]: Finished difference Result 384 states and 489 transitions. [2021-05-06 08:23:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 08:23:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 97 [2021-05-06 08:23:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,443 INFO L225 Difference]: With dead ends: 384 [2021-05-06 08:23:26,443 INFO L226 Difference]: Without dead ends: 384 [2021-05-06 08:23:26,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:23:26,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-06 08:23:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 376. [2021-05-06 08:23:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 281 states have (on average 1.1921708185053381) internal successors, (335), 285 states have internal predecessors, (335), 74 states have call successors, (74), 22 states have call predecessors, (74), 20 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:26,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 481 transitions. [2021-05-06 08:23:26,452 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 481 transitions. Word has length 97 [2021-05-06 08:23:26,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,452 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 481 transitions. [2021-05-06 08:23:26,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:26,452 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 481 transitions. [2021-05-06 08:23:26,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:26,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,454 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:26,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:23:26,669 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:26,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1153601599, now seen corresponding path program 4 times [2021-05-06 08:23:26,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:26,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936824457] [2021-05-06 08:23:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:26,674 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:26,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017840492] [2021-05-06 08:23:26,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:26,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:23:26,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:23:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 08:23:26,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936824457] [2021-05-06 08:23:26,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:26,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017840492] [2021-05-06 08:23:26,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017840492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:23:26,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:23:26,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:23:26,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704779781] [2021-05-06 08:23:26,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:23:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:23:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:26,926 INFO L87 Difference]: Start difference. First operand 376 states and 481 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:26,949 INFO L93 Difference]: Finished difference Result 429 states and 553 transitions. [2021-05-06 08:23:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:23:26,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 99 [2021-05-06 08:23:26,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:26,952 INFO L225 Difference]: With dead ends: 429 [2021-05-06 08:23:26,952 INFO L226 Difference]: Without dead ends: 394 [2021-05-06 08:23:26,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:23:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-06 08:23:26,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 384. [2021-05-06 08:23:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 289 states have (on average 1.1972318339100345) internal successors, (346), 293 states have internal predecessors, (346), 74 states have call successors, (74), 22 states have call predecessors, (74), 20 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 492 transitions. [2021-05-06 08:23:26,968 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 492 transitions. Word has length 99 [2021-05-06 08:23:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:26,969 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 492 transitions. [2021-05-06 08:23:26,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:23:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 492 transitions. [2021-05-06 08:23:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 08:23:26,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:26,970 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:27,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,183 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2111868500, now seen corresponding path program 5 times [2021-05-06 08:23:27,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356935212] [2021-05-06 08:23:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212739204] [2021-05-06 08:23:27,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:23:27,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:23:27,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:23:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:23:27,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:23:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 26 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:23:27,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:23:27,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356935212] [2021-05-06 08:23:27,496 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:23:27,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212739204] [2021-05-06 08:23:27,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212739204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:23:27,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:23:27,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:23:27,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371519636] [2021-05-06 08:23:27,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:23:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:23:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:23:27,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:23:27,498 INFO L87 Difference]: Start difference. First operand 384 states and 492 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:23:27,742 INFO L93 Difference]: Finished difference Result 396 states and 504 transitions. [2021-05-06 08:23:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:23:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 99 [2021-05-06 08:23:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:23:27,744 INFO L225 Difference]: With dead ends: 396 [2021-05-06 08:23:27,744 INFO L226 Difference]: Without dead ends: 396 [2021-05-06 08:23:27,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:23:27,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-06 08:23:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-05-06 08:23:27,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 301 states have (on average 1.1893687707641196) internal successors, (358), 301 states have internal predecessors, (358), 74 states have call successors, (74), 22 states have call predecessors, (74), 20 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 08:23:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 504 transitions. [2021-05-06 08:23:27,753 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 504 transitions. Word has length 99 [2021-05-06 08:23:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:23:27,753 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 504 transitions. [2021-05-06 08:23:27,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 08:23:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 504 transitions. [2021-05-06 08:23:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 08:23:27,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:23:27,755 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:23:27,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:27,956 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:23:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:23:27,956 INFO L82 PathProgramCache]: Analyzing trace with hash -708686281, now seen corresponding path program 3 times [2021-05-06 08:23:27,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:23:27,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626570657] [2021-05-06 08:23:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:23:27,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:23:27,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381674468] [2021-05-06 08:23:27,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:23:28,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:23:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:23:28,140 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:23:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:23:28,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:23:28,276 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:23:28,276 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:23:28,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:23:28,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:23:28 BasicIcfg [2021-05-06 08:23:28,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:23:28,590 INFO L168 Benchmark]: Toolchain (without parser) took 29983.66 ms. Allocated memory was 213.9 MB in the beginning and 356.5 MB in the end (delta: 142.6 MB). Free memory was 178.8 MB in the beginning and 328.6 MB in the end (delta: -149.8 MB). Peak memory consumption was 155.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:28,590 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 213.9 MB. Free memory is still 196.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:23:28,590 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.49 ms. Allocated memory is still 213.9 MB. Free memory was 178.7 MB in the beginning and 197.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:28,590 INFO L168 Benchmark]: Boogie Preprocessor took 49.87 ms. Allocated memory is still 213.9 MB. Free memory was 197.1 MB in the beginning and 195.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:23:28,591 INFO L168 Benchmark]: RCFGBuilder took 368.38 ms. Allocated memory is still 213.9 MB. Free memory was 195.5 MB in the beginning and 178.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:28,591 INFO L168 Benchmark]: IcfgTransformer took 34.11 ms. Allocated memory is still 213.9 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:28,591 INFO L168 Benchmark]: TraceAbstraction took 29216.23 ms. Allocated memory was 213.9 MB in the beginning and 356.5 MB in the end (delta: 142.6 MB). Free memory was 176.6 MB in the beginning and 328.6 MB in the end (delta: -152.0 MB). Peak memory consumption was 153.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:23:28,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 213.9 MB. Free memory is still 196.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.49 ms. Allocated memory is still 213.9 MB. Free memory was 178.7 MB in the beginning and 197.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 14.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.87 ms. Allocated memory is still 213.9 MB. Free memory was 197.1 MB in the beginning and 195.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 368.38 ms. Allocated memory is still 213.9 MB. Free memory was 195.5 MB in the beginning and 178.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.11 ms. Allocated memory is still 213.9 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 29216.23 ms. Allocated memory was 213.9 MB in the beginning and 356.5 MB in the end (delta: 142.6 MB). Free memory was 176.6 MB in the beginning and 328.6 MB in the end (delta: -152.0 MB). Peak memory consumption was 153.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=21, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(counter)=0, A=7, counter=0, R=2] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L27] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=2] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=2, r=-3, u=5, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, r=-3, R=2, u=5, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, r=-3, R=2, u=5, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, R=2, r=-3, u=5, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, r=-3, R=2, u=5, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=2, R=2, r=-3, u=5, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=3, counter++=2, r=-3, R=2, u=5, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=3, r=-3, R=2, u=5, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=3, R=2, r=2, u=7, v=1] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=4, counter++=3, R=2, r=2, u=7, v=1] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=4, r=2, R=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=5, counter++=4, R=2, r=2, u=7, v=1] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=5, r=2, R=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=5, R=2, r=2, u=7, v=1] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=6, counter++=5, r=2, R=2, u=7, v=1] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=6, R=2, r=2, u=7, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=6, r=1, R=2, u=7, v=3] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=7, counter++=6, R=2, r=1, u=7, v=3] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=7, r=1, R=2, u=7, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [\old(counter)=0, A=7, counter=7, r=-2, R=2, u=7, v=5] [L39] EXPR counter++ VAL [\old(counter)=0, A=7, counter=8, counter++=7, R=2, r=-2, u=7, v=5] [L39] COND TRUE counter++<10 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L41] COND TRUE !(r > 0) VAL [\old(counter)=0, A=7, counter=8, R=2, r=-2, u=7, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=9, counter++=8, R=2, r=-2, u=7, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=9, R=2, r=-2, u=7, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [\old(counter)=0, A=7, counter=9, r=5, R=2, u=9, v=5] [L47] EXPR counter++ VAL [\old(counter)=0, A=7, counter=10, counter++=9, R=2, r=5, u=9, v=5] [L47] COND TRUE counter++<10 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=10, r=5, R=2, u=9, v=5] [L49] COND TRUE !(r < 0) VAL [\old(counter)=0, A=7, counter=10, r=5, R=2, u=9, v=5] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=11, counter++=10, R=2, r=5, u=9, v=5] [L34] COND FALSE !(counter++<10) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29058.6ms, OverallIterations: 32, TraceHistogramMax: 11, EmptinessCheckTime: 45.5ms, AutomataDifference: 12897.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1480 SDtfs, 1460 SDslu, 3689 SDs, 0 SdLazy, 1824 SolverSat, 1125 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 11202.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2069 GetRequests, 1786 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1642.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=396occurred in iteration=31, InterpolantAutomatonStates: 341, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 266.6ms AutomataMinimizationTime, 31 MinimizatonAttempts, 147 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 319.6ms SsaConstructionTime, 2188.2ms SatisfiabilityAnalysisTime, 4961.1ms InterpolantComputationTime, 2113 NumberOfCodeBlocks, 2111 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 1979 ConstructedInterpolants, 0 QuantifiedInterpolants, 5159 SizeOfPredicates, 160 NumberOfNonLiveVariables, 6609 ConjunctsInSsa, 411 ConjunctsInUnsatCore, 31 InterpolantComputations, 7 PerfectInterpolantSequences, 929/2878 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...