/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/ps6-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:52:52,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:52:52,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:52:52,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:52:52,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:52:52,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:52:52,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:52:52,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:52:52,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:52:52,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:52:52,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:52:52,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:52:52,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:52:52,854 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:52:52,855 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:52:52,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:52:52,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:52:52,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:52:52,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:52:52,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:52:52,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:52:52,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:52:52,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:52:52,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:52:52,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:52:52,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:52:52,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:52:52,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:52:52,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:52:52,892 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:52:52,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:52:52,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:52:52,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:52:52,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:52:52,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:52:52,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:52:52,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:52:52,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:52:52,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:52:52,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:52:52,896 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:52:52,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:52:52,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:52:52,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:52:52,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:52:52,897 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:52:52,897 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:52:53,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:52:53,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:52:53,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:52:53,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:52:53,224 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:52:53,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-06 10:52:53,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e637500a9/56d59afe26d34517a654afb7d29eaba0/FLAG419cb4b3b [2021-05-06 10:52:53,710 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:52:53,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound50.c [2021-05-06 10:52:53,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e637500a9/56d59afe26d34517a654afb7d29eaba0/FLAG419cb4b3b [2021-05-06 10:52:53,732 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e637500a9/56d59afe26d34517a654afb7d29eaba0 [2021-05-06 10:52:53,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:52:53,736 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:52:53,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:52:53,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:52:53,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:52:53,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f932432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53, skipping insertion in model container [2021-05-06 10:52:53,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:52:53,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:52:53,876 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/ps6-ll_valuebound50.c[458,471] [2021-05-06 10:52:53,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:52:53,928 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:52:53,947 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/ps6-ll_valuebound50.c[458,471] [2021-05-06 10:52:53,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:52:53,967 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:52:53,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53 WrapperNode [2021-05-06 10:52:53,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:52:53,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:52:53,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:52:53,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:52:53,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (1/1) ... [2021-05-06 10:52:53,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:52:53,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:52:53,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:52:53,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:52:53,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (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 10:52:54,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:52:54,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:52:54,063 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:52:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:52:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:52:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:52:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:52:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:52:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:52:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:52:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:52:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:52:54,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:52:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:52:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:52:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:52:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:52:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:52:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:52:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:52:54,365 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:52:54,365 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:52:54,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54 BoogieIcfgContainer [2021-05-06 10:52:54,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:52:54,367 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:52:54,367 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:52:54,368 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:52:54,370 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54" (1/1) ... [2021-05-06 10:52:54,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:52:54 BasicIcfg [2021-05-06 10:52:54,381 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:52:54,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:52:54,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:52:54,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:52:54,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:52:53" (1/4) ... [2021-05-06 10:52:54,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2808cbc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:52:53" (2/4) ... [2021-05-06 10:52:54,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2808cbc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:52:54" (3/4) ... [2021-05-06 10:52:54,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2808cbc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:52:54, skipping insertion in model container [2021-05-06 10:52:54,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:52:54" (4/4) ... [2021-05-06 10:52:54,387 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound50.cJordan [2021-05-06 10:52:54,392 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:52:54,395 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:52:54,408 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:52:54,423 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:52:54,423 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:52:54,424 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:52:54,424 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:52:54,424 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:52:54,424 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:52:54,424 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:52:54,424 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:52:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:52:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:52:54,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:54,456 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 10:52:54,457 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:52:54,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:54,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455370189] [2021-05-06 10:52:54,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:52:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:52:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:52:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,691 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 10:52:54,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455370189] [2021-05-06 10:52:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455370189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:52:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:52:54,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:52:54,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110781933] [2021-05-06 10:52:54,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:52:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:52:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:52:54,710 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 10:52:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:54,814 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:52:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:52:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 10:52:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:54,823 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:52:54,823 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:52:54,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:52:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:52:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:52:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:52:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:52:54,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:52:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:54,859 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:52:54,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 10:52:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:52:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:52:54,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:54,862 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 10:52:54,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:52:54,863 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:52:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543052146] [2021-05-06 10:52:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:54,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:54,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385386919] [2021-05-06 10:52:54,884 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 10:52:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:54,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:52:54,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:55,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:55,093 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 10:52:55,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:55,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543052146] [2021-05-06 10:52:55,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:55,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385386919] [2021-05-06 10:52:55,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385386919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:52:55,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:52:55,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:52:55,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74001417] [2021-05-06 10:52:55,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:52:55,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:55,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:52:55,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:52:55,096 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 10:52:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:55,154 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:52:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:52:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 22 [2021-05-06 10:52:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:55,156 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:52:55,156 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:52:55,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:52:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:52:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:52:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:52:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:52:55,163 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:52:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:55,163 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:52:55,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 10:52:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:52:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:52:55,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:55,164 INFO L523 BasicCegarLoop]: trace histogram [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 10:52:55,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:52:55,386 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:52:55,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:55,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145247565] [2021-05-06 10:52:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:55,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:55,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313548927] [2021-05-06 10:52:55,407 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 10:52:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:52:55,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:55,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:52:55,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145247565] [2021-05-06 10:52:55,626 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313548927] [2021-05-06 10:52:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313548927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:52:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010386823] [2021-05-06 10:52:55,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:52:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:55,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:52:55,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:52:55,628 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:52:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:55,739 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:52:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:52:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:52:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:55,740 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:52:55,741 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:52:55,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:52:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:52:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:52:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:52:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:52:55,746 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:52:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:55,747 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:52:55,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:52:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:52:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:52:55,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:55,748 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:55,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:55,953 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:55,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:55,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:52:55,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832568191] [2021-05-06 10:52:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:55,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:55,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808215396] [2021-05-06 10:52:55,980 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 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 10:52:56,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:52:56,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:52:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:52:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:56,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 10:52:56,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:56,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832568191] [2021-05-06 10:52:56,388 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:56,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808215396] [2021-05-06 10:52:56,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808215396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:56,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:56,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:52:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834360723] [2021-05-06 10:52:56,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:52:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:56,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:52:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:52:56,390 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:52:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:56,484 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:52:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:52:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 10:52:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:56,486 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:52:56,486 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:52:56,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:52:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:52:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:52:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:52:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:52:56,492 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:52:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:56,492 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:52:56,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:52:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:52:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:52:56,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:56,494 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-05-06 10:52:56,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:56,695 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:52:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:56,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337228616] [2021-05-06 10:52:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:56,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:56,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789895983] [2021-05-06 10:52:56,706 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 10:52:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:52:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:52:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:56,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 10:52:57,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337228616] [2021-05-06 10:52:57,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789895983] [2021-05-06 10:52:57,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789895983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:57,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:57,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:52:57,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557859070] [2021-05-06 10:52:57,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:52:57,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:57,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:52:57,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:52:57,062 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:52:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:57,271 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:52:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:52:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:52:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:57,273 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:52:57,274 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:52:57,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:52:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:52:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:52:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:52:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:52:57,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:52:57,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:57,280 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:52:57,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:52:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:52:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:52:57,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:57,281 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:57,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:57,503 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:52:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:57,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918849342] [2021-05-06 10:52:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:57,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:57,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676207949] [2021-05-06 10:52:57,523 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 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 10:52:58,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:52:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:52:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:52:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:58,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:52:58,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918849342] [2021-05-06 10:52:58,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:58,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676207949] [2021-05-06 10:52:58,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676207949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:58,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:58,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:52:58,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53857326] [2021-05-06 10:52:58,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:52:58,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:58,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:52:58,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:52:58,410 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:52:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:58,470 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:52:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:52:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 10:52:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:58,473 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:52:58,473 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:52:58,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:52:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:52:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:52:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:52:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:52:58,480 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:52:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:58,481 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:52:58,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 10:52:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:52:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:52:58,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:58,482 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:58,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:52:58,685 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:58,686 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:52:58,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:58,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761113216] [2021-05-06 10:52:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:58,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:58,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825397710] [2021-05-06 10:52:58,704 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 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 10:52:58,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:52:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:52:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:52:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:58,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:52:58,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761113216] [2021-05-06 10:52:58,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:58,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825397710] [2021-05-06 10:52:58,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825397710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:58,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:58,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:52:58,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802395243] [2021-05-06 10:52:58,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:52:58,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:52:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:52:58,936 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:52:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:59,010 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:52:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:52:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:52:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:59,012 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:52:59,012 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:52:59,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:52:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:52:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:52:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:52:59,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:52:59,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:52:59,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:59,016 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:52:59,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:52:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:52:59,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:52:59,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:59,017 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:59,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:52:59,221 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:52:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:59,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903412387] [2021-05-06 10:52:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:59,231 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:59,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230559060] [2021-05-06 10:52:59,231 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 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 10:52:59,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:52:59,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:52:59,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:52:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:52:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:52:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:52:59,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:52:59,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903412387] [2021-05-06 10:52:59,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:52:59,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230559060] [2021-05-06 10:52:59,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230559060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:52:59,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:52:59,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:52:59,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238328979] [2021-05-06 10:52:59,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:52:59,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:52:59,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:52:59,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:52:59,594 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:52:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:52:59,715 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:52:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:52:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:52:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:52:59,719 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:52:59,719 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:52:59,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:52:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:52:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:52:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:52:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:52:59,725 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:52:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:52:59,726 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:52:59,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:52:59,726 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:52:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:52:59,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:52:59,730 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:52:59,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:52:59,938 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:52:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:52:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:52:59,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:52:59,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264128019] [2021-05-06 10:52:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:52:59,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:52:59,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522910989] [2021-05-06 10:52:59,950 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 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 10:53:00,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:53:00,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:00,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:53:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:00,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:53:00,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:00,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264128019] [2021-05-06 10:53:00,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:00,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522910989] [2021-05-06 10:53:00,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522910989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:00,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:00,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:53:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128177879] [2021-05-06 10:53:00,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:53:00,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:00,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:53:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:53:00,235 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:53:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:00,360 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:53:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:53:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:53:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:00,361 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:53:00,361 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:53:00,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:53:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:53:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:53:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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 10:53:00,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:53:00,365 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:53:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:00,365 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:53:00,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:53:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:53:00,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:53:00,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:00,366 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:00,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:53:00,590 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:00,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:00,591 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:53:00,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:00,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395338996] [2021-05-06 10:53:00,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:00,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:00,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333362620] [2021-05-06 10:53:00,599 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 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 10:53:01,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:53:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:53:01,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:53:01,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:53:01,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:53:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 10:53:01,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:53:01,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395338996] [2021-05-06 10:53:01,442 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:53:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333362620] [2021-05-06 10:53:01,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333362620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:53:01,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:53:01,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:53:01,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202952675] [2021-05-06 10:53:01,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:53:01,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:53:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:53:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:53:01,443 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:53:01,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:53:01,575 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:53:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:53:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-06 10:53:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:53:01,576 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:53:01,576 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:53:01,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:53:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:53:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 10:53:01,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:53:01,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 10:53:01,581 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 10:53:01,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:53:01,581 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 10:53:01,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-06 10:53:01,582 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 10:53:01,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 10:53:01,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:53:01,582 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:53:01,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:53:01,793 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:53:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:53:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-06 10:53:01,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:53:01,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489655278] [2021-05-06 10:53:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:53:01,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:53:01,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308452021] [2021-05-06 10:53:01,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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