/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_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:42:28,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:42:28,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:42:29,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:42:29,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:42:29,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:42:29,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:42:29,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:42:29,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:42:29,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:42:29,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:42:29,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:42:29,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:42:29,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:42:29,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:42:29,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:42:29,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:42:29,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:42:29,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:42:29,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:42:29,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:42:29,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:42:29,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:42:29,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:42:29,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:42:29,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:42:29,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:42:29,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:42:29,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:42:29,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:42:29,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:42:29,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:42:29,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:42:29,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:42:29,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:42:29,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:42:29,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:42:29,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:42:29,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:42:29,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:42:29,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:42:29,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:42:29,077 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:42:29,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:42:29,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:42:29,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:42:29,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:42:29,352 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:42:29,353 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:42:29,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-05-06 10:42:29,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6627bf65/d4c7d6ead33848d5a103c41d7e754b74/FLAGcf159aa25 [2021-05-06 10:42:29,921 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:42:29,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2021-05-06 10:42:29,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6627bf65/d4c7d6ead33848d5a103c41d7e754b74/FLAGcf159aa25 [2021-05-06 10:42:30,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6627bf65/d4c7d6ead33848d5a103c41d7e754b74 [2021-05-06 10:42:30,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:42:30,411 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:42:30,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:30,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:42:30,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:42:30,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a8a8d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30, skipping insertion in model container [2021-05-06 10:42:30,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:42:30,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:42:30,565 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_unwindbound50.c[458,471] [2021-05-06 10:42:30,588 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:30,594 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:42:30,600 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_unwindbound50.c[458,471] [2021-05-06 10:42:30,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:42:30,612 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:42:30,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30 WrapperNode [2021-05-06 10:42:30,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:42:30,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:42:30,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:42:30,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:42:30,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:42:30,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:42:30,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:42:30,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:42:30,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (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 10:42:30,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:42:30,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:42:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:42:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:42:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:42:30,712 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:42:30,712 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:42:30,712 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:42:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:42:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:42:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:42:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:42:30,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:42:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:42:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:42:30,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:42:30,930 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:42:30,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:30 BoogieIcfgContainer [2021-05-06 10:42:30,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:42:30,931 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:42:30,932 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:42:30,932 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:42:30,934 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:30" (1/1) ... [2021-05-06 10:42:30,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:30 BasicIcfg [2021-05-06 10:42:30,945 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:42:30,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:42:30,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:42:30,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:42:30,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:42:30" (1/4) ... [2021-05-06 10:42:30,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190ff124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:30, skipping insertion in model container [2021-05-06 10:42:30,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:42:30" (2/4) ... [2021-05-06 10:42:30,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190ff124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:42:30, skipping insertion in model container [2021-05-06 10:42:30,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:42:30" (3/4) ... [2021-05-06 10:42:30,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190ff124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:42:30, skipping insertion in model container [2021-05-06 10:42:30,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:42:30" (4/4) ... [2021-05-06 10:42:30,950 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.cJordan [2021-05-06 10:42:30,953 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:42:30,956 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:42:30,965 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:42:30,977 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:42:30,977 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:42:30,977 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:42:30,977 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:42:30,977 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:42:30,977 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:42:30,977 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:42:30,977 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:42:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:42:30,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:42:30,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:30,989 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:30,989 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-06 10:42:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:30,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731009276] [2021-05-06 10:42:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:31,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:42:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:31,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:42:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:31,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:31,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731009276] [2021-05-06 10:42:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731009276] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:31,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:31,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:42:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119233585] [2021-05-06 10:42:31,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:42:31,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:42:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:31,172 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:31,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:31,260 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-06 10:42:31,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:42:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:42:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:31,267 INFO L225 Difference]: With dead ends: 30 [2021-05-06 10:42:31,267 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 10:42:31,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:42:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 10:42:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-06 10:42:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:42:31,293 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-06 10:42:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:31,294 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:42:31,294 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:42:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:31,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:31,296 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:31,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:42:31,296 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-06 10:42:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:31,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129330669] [2021-05-06 10:42:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:31,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:31,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152928901] [2021-05-06 10:42:31,331 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 10:42:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:31,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:42:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:31,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:31,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129330669] [2021-05-06 10:42:31,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152928901] [2021-05-06 10:42:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152928901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:31,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:31,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:42:31,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943893941] [2021-05-06 10:42:31,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:42:31,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:31,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:42:31,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:31,481 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:42:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:31,496 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 10:42:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:42:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 10:42:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:31,498 INFO L225 Difference]: With dead ends: 26 [2021-05-06 10:42:31,498 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:42:31,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:42:31,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:42:31,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:42:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:31,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:42:31,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-06 10:42:31,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:31,504 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:42:31,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:42:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:42:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 10:42:31,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:31,505 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:31,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:42:31,706 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:31,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:31,707 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-06 10:42:31,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:31,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148153499] [2021-05-06 10:42:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:31,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:31,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589165328] [2021-05-06 10:42:31,722 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 10:42:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:31,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:31,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148153499] [2021-05-06 10:42:31,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:31,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589165328] [2021-05-06 10:42:31,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589165328] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:42:31,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:42:31,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:42:31,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418889577] [2021-05-06 10:42:31,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:31,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:31,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:31,839 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:31,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:31,975 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-06 10:42:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:42:31,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 10:42:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:31,976 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:31,977 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 10:42:31,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 10:42:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 10:42:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 10:42:31,981 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 10:42:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:31,981 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 10:42:31,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:42:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 10:42:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:31,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:31,982 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:32,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:32,183 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-06 10:42:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:32,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053043846] [2021-05-06 10:42:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:32,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:32,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641679269] [2021-05-06 10:42:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:42:32,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:32,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:32,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053043846] [2021-05-06 10:42:32,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641679269] [2021-05-06 10:42:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641679269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:32,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:32,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:42:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109726452] [2021-05-06 10:42:32,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:42:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:42:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:42:32,416 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:32,444 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 10:42:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:42:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:32,445 INFO L225 Difference]: With dead ends: 34 [2021-05-06 10:42:32,445 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:42:32,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:42:32,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:42:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:42:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:42:32,448 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:42:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:32,448 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:42:32,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:42:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:42:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:42:32,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:32,449 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:32,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:32,667 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-06 10:42:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:32,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841294573] [2021-05-06 10:42:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:32,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:32,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226799393] [2021-05-06 10:42:32,677 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 10:42:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:32,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:42:32,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:32,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:32,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:32,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841294573] [2021-05-06 10:42:32,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:32,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226799393] [2021-05-06 10:42:32,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226799393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:32,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:32,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:42:32,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740193401] [2021-05-06 10:42:32,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:42:32,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:32,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:42:32,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:32,820 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:32,855 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 10:42:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:42:32,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 10:42:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:32,856 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:42:32,856 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:42:32,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:42:32,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:42:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:42:32,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-06 10:42:32,859 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-06 10:42:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:32,860 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-06 10:42:32,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:42:32,860 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-06 10:42:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:42:32,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:32,860 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:33,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:33,077 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-06 10:42:33,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:33,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361751964] [2021-05-06 10:42:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:33,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:33,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294364760] [2021-05-06 10:42:33,086 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 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 10:42:33,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:33,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:42:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:33,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:42:33,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:33,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361751964] [2021-05-06 10:42:33,271 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:33,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294364760] [2021-05-06 10:42:33,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294364760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:33,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:33,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:42:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438084042] [2021-05-06 10:42:33,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:42:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:42:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:42:33,272 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:33,326 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:42:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:42:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:42:33,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:33,327 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:42:33,328 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:42:33,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:42:33,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:42:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 10:42:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:42:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:42:33,332 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-06 10:42:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:33,332 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:42:33,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:42:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:42:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:42:33,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:33,333 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:33,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:42:33,549 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-06 10:42:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:33,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196010252] [2021-05-06 10:42:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:33,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:33,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435385071] [2021-05-06 10:42:33,562 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 10:42:33,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:42:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:33,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:42:33,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:33,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196010252] [2021-05-06 10:42:33,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:33,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435385071] [2021-05-06 10:42:33,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435385071] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:33,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:33,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875395848] [2021-05-06 10:42:33,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:33,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:33,789 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:33,871 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-06 10:42:33,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 10:42:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:33,872 INFO L225 Difference]: With dead ends: 54 [2021-05-06 10:42:33,873 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 10:42:33,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:42:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 10:42:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 10:42:33,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:42:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-06 10:42:33,878 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-06 10:42:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:33,879 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-06 10:42:33,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 10:42:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-06 10:42:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:42:33,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:33,880 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:34,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:34,086 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-06 10:42:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:34,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483743252] [2021-05-06 10:42:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:34,093 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748451273] [2021-05-06 10:42:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:42:34,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:42:34,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483743252] [2021-05-06 10:42:34,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:34,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748451273] [2021-05-06 10:42:34,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748451273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:34,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:34,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:34,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857703071] [2021-05-06 10:42:34,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:34,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:34,270 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:34,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:34,328 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:42:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:34,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-06 10:42:34,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:34,330 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:42:34,330 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:42:34,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:42:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:42:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:42:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:42:34,334 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-06 10:42:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:34,334 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:42:34,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 10:42:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:42:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:42:34,335 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:34,335 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:34,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:34,541 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-06 10:42:34,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:34,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930451541] [2021-05-06 10:42:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:34,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:34,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979163003] [2021-05-06 10:42:34,551 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 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 10:42:36,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:42:36,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:36,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:36,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:36,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:42:36,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:36,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930451541] [2021-05-06 10:42:36,602 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:36,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979163003] [2021-05-06 10:42:36,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979163003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:36,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:36,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:36,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731312117] [2021-05-06 10:42:36,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:36,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:36,605 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:42:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:36,714 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-05-06 10:42:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-05-06 10:42:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:36,715 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:42:36,715 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 10:42:36,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 10:42:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-05-06 10:42:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:42:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-05-06 10:42:36,718 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 42 [2021-05-06 10:42:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:36,718 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-05-06 10:42:36,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:42:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-05-06 10:42:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 10:42:36,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:36,719 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:42:36,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:42:36,933 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2021-05-06 10:42:36,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:36,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867090939] [2021-05-06 10:42:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:36,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817309877] [2021-05-06 10:42:36,941 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 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 10:42:37,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:42:37,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:37,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:37,253 WARN L159 QuantifierPusher]: Ignoring assumption.