/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_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:44:45,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:44:46,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:44:46,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:44:46,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:44:46,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:44:46,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:44:46,047 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:44:46,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:44:46,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:44:46,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:44:46,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:44:46,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:44:46,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:44:46,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:44:46,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:44:46,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:44:46,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:44:46,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:44:46,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:44:46,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:44:46,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:44:46,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:44:46,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:44:46,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:44:46,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:44:46,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:44:46,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:44:46,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:44:46,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:44:46,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:44:46,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:44:46,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:44:46,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:44:46,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:44:46,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:44:46,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:44:46,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:44:46,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:44:46,119 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:44:46,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:44:46,120 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:44:46,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:44:46,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:44:46,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:44:46,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:44:46,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:44:46,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:44:46,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:44:46,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:44:46,123 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:44:46,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:44:46,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:44:46,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:44:46,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:44:46,475 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:44:46,476 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:44:46,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2021-05-06 10:44:46,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc43acba/a03e678a258a4da6a93f83f9469b69bf/FLAGc95cd696c [2021-05-06 10:44:46,894 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:44:46,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound100.c [2021-05-06 10:44:46,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc43acba/a03e678a258a4da6a93f83f9469b69bf/FLAGc95cd696c [2021-05-06 10:44:47,318 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc43acba/a03e678a258a4da6a93f83f9469b69bf [2021-05-06 10:44:47,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:44:47,323 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:44:47,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:44:47,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:44:47,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:44:47,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f19712 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47, skipping insertion in model container [2021-05-06 10:44:47,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:44:47,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:44:47,457 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_valuebound100.c[458,471] [2021-05-06 10:44:47,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:44:47,478 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:44:47,497 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_valuebound100.c[458,471] [2021-05-06 10:44:47,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:44:47,520 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:44:47,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47 WrapperNode [2021-05-06 10:44:47,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:44:47,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:44:47,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:44:47,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:44:47,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:44:47,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:44:47,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:44:47,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:44:47,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (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 10:44:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:44:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:44:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:44:47,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:44:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:44:47,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:44:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:44:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:44:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:44:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:44:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:44:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:44:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:44:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:44:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:44:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:44:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:44:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:44:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:44:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:44:47,958 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:44:47,959 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:44:47,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:44:47 BoogieIcfgContainer [2021-05-06 10:44:47,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:44:47,961 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:44:47,961 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:44:47,961 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:44:47,964 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:44:47" (1/1) ... [2021-05-06 10:44:47,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:44:47 BasicIcfg [2021-05-06 10:44:47,976 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:44:47,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:44:47,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:44:47,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:44:47,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:44:47" (1/4) ... [2021-05-06 10:44:47,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73006bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:44:47, skipping insertion in model container [2021-05-06 10:44:47,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:44:47" (2/4) ... [2021-05-06 10:44:47,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73006bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:44:47, skipping insertion in model container [2021-05-06 10:44:47,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:44:47" (3/4) ... [2021-05-06 10:44:47,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73006bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:44:47, skipping insertion in model container [2021-05-06 10:44:47,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:44:47" (4/4) ... [2021-05-06 10:44:47,983 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound100.cJordan [2021-05-06 10:44:47,987 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:44:47,990 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:44:48,005 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:44:48,021 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:44:48,021 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:44:48,021 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:44:48,021 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:44:48,021 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:44:48,021 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:44:48,021 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:44:48,021 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:44:48,032 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 10:44:48,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:44:48,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:48,039 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 10:44:48,039 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:48,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:44:48,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:48,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282090402] [2021-05-06 10:44:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:48,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:44:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:48,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:44:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:48,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:44:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:48,367 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 10:44:48,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:48,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282090402] [2021-05-06 10:44:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282090402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:44:48,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:44:48,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:44:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876300835] [2021-05-06 10:44:48,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:44:48,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:44:48,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:44:48,391 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 10:44:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:48,489 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:44:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:44:48,491 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 10:44:48,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:48,498 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:44:48,498 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:44:48,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:44:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:44:48,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:44:48,530 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 10:44:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:44:48,535 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:44:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:48,535 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:44:48,536 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 10:44:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:44:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:44:48,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:48,538 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 10:44:48,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:44:48,539 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:48,540 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:44:48,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:48,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048282014] [2021-05-06 10:44:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:48,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:48,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999733420] [2021-05-06 10:44:48,576 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 10:44:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:44:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:48,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:48,799 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 10:44:48,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:48,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048282014] [2021-05-06 10:44:48,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:48,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999733420] [2021-05-06 10:44:48,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999733420] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:44:48,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:44:48,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:44:48,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452361710] [2021-05-06 10:44:48,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:44:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:44:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:44:48,803 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 10:44:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:48,871 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:44:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:44:48,872 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 10:44:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:48,873 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:44:48,873 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:44:48,873 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:44:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:44:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:44:48,882 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 10:44:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:44:48,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:44:48,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:48,886 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:44:48,886 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 10:44:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:44:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:44:48,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:48,887 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 10:44:49,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:44:49,115 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:49,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:49,115 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:44:49,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:49,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472502274] [2021-05-06 10:44:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:49,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050938228] [2021-05-06 10:44:49,142 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 10:44:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:49,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:44:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:49,397 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 10:44:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472502274] [2021-05-06 10:44:49,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050938228] [2021-05-06 10:44:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050938228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:49,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:49,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:44:49,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038026159] [2021-05-06 10:44:49,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:44:49,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:49,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:44:49,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:44:49,400 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 10:44:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:49,535 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:44:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:44:49,536 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 10:44:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:49,537 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:44:49,537 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:44:49,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:44:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:44:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:44:49,541 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 10:44:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:44:49,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:44:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:49,543 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:44:49,543 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 10:44:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:44:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:44:49,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:49,544 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 10:44:49,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:49,749 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:44:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:49,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354259158] [2021-05-06 10:44:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:49,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:49,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653929251] [2021-05-06 10:44:49,759 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 10:44:49,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:44:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:44:49,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,103 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 10:44:50,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:50,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354259158] [2021-05-06 10:44:50,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:50,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653929251] [2021-05-06 10:44:50,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653929251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:50,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:50,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:44:50,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340354214] [2021-05-06 10:44:50,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:44:50,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:44:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:44:50,106 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 10:44:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:50,183 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:44:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:44:50,184 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 10:44:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:50,185 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:44:50,185 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:44:50,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:44:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:44:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:44:50,190 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 10:44:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:44:50,191 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:44:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:50,192 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:44:50,192 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 10:44:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:44:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:44:50,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:50,193 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 10:44:50,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:50,399 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:50,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:44:50,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:50,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633548514] [2021-05-06 10:44:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:50,413 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:50,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646377778] [2021-05-06 10:44:50,414 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 10:44:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:50,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:44:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:50,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:50,805 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 10:44:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633548514] [2021-05-06 10:44:50,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646377778] [2021-05-06 10:44:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646377778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:50,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:50,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:44:50,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776924031] [2021-05-06 10:44:50,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:44:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:44:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:44:50,808 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 10:44:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:51,038 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:44:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:44:51,038 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 10:44:51,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:51,040 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:44:51,040 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:44:51,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:44:51,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:44:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:44:51,044 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 10:44:51,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:44:51,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:44:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:51,053 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:44:51,053 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 10:44:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:44:51,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:44:51,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:51,055 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 10:44:51,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:51,256 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:51,256 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:44:51,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:51,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563819131] [2021-05-06 10:44:51,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:51,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:51,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627332632] [2021-05-06 10:44:51,268 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 10:44:51,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:44:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:44:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:52,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,098 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 10:44:52,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563819131] [2021-05-06 10:44:52,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627332632] [2021-05-06 10:44:52,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627332632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:52,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:52,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:44:52,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795111964] [2021-05-06 10:44:52,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:44:52,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:52,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:44:52,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:44:52,101 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 10:44:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:52,157 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:44:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:44:52,158 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 10:44:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:52,159 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:44:52,159 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:44:52,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:44:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:44:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:44:52,162 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 10:44:52,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:44:52,163 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:44:52,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:52,164 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:44:52,164 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 10:44:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:44:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:44:52,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:52,165 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 10:44:52,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:44:52,371 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:52,371 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:44:52,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:52,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081644636] [2021-05-06 10:44:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:52,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972433059] [2021-05-06 10:44:52,381 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 10:44:52,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:44:52,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:44:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:52,611 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 10:44:52,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:52,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081644636] [2021-05-06 10:44:52,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:52,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972433059] [2021-05-06 10:44:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972433059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:52,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:52,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:44:52,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561536933] [2021-05-06 10:44:52,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:44:52,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:52,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:44:52,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:44:52,613 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 10:44:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:52,697 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:44:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:44:52,700 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 10:44:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:52,701 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:44:52,701 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:44:52,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:44:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:44:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:44:52,705 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 10:44:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:44:52,705 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:44:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:52,706 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:44:52,706 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 10:44:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:44:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:44:52,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:52,707 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 10:44:52,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:52,929 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:44:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105225054] [2021-05-06 10:44:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:52,937 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511674169] [2021-05-06 10:44:52,937 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 10:44:53,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:44:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:44:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:53,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,398 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 10:44:53,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105225054] [2021-05-06 10:44:53,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:53,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511674169] [2021-05-06 10:44:53,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511674169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:53,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:53,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:44:53,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250043721] [2021-05-06 10:44:53,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:44:53,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:44:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:44:53,400 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 10:44:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:53,494 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:44:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:44:53,495 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 10:44:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:53,495 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:44:53,495 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:44:53,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:44:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:44:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:44:53,499 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 10:44:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:44:53,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:44:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:44:53,500 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 10:44:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:44:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:44:53,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:53,501 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 10:44:53,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:44:53,705 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:44:53,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:53,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775091226] [2021-05-06 10:44:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:53,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:53,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201205366] [2021-05-06 10:44:53,715 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 10:44:53,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:44:53,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:44:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:53,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:53,981 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 10:44:53,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:53,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775091226] [2021-05-06 10:44:53,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:53,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201205366] [2021-05-06 10:44:53,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201205366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:53,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:53,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:44:53,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115475829] [2021-05-06 10:44:53,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:44:53,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:44:53,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:44:53,984 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 10:44:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:54,109 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:44:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:44:54,109 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 10:44:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:54,110 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:44:54,110 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:44:54,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:44:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:44:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:44:54,114 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 10:44:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:44:54,115 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:44:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:54,115 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:44:54,115 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 10:44:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:44:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:44:54,116 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:54,116 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 10:44:54,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:44:54,331 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:54,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:54,331 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:44:54,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:54,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995070613] [2021-05-06 10:44:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:54,339 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:54,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401935971] [2021-05-06 10:44:54,340 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 10:44:54,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:44:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:44:54,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:55,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:55,172 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 10:44:55,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995070613] [2021-05-06 10:44:55,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401935971] [2021-05-06 10:44:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401935971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:55,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:55,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:44:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135577247] [2021-05-06 10:44:55,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:44:55,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:55,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:44:55,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:44:55,174 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 10:44:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:55,321 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-05-06 10:44:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:44:55,321 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 10:44:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:55,322 INFO L225 Difference]: With dead ends: 56 [2021-05-06 10:44:55,322 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:44:55,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:44:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:44:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 10:44:55,326 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 10:44:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-06 10:44:55,327 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-06 10:44:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:55,327 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-06 10:44:55,327 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 10:44:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-06 10:44:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 10:44:55,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:55,328 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 10:44:55,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:55,535 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:55,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:55,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-06 10:44:55,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:55,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242420738] [2021-05-06 10:44:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:55,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79104210] [2021-05-06 10:44:55,543 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 [2021-05-06 10:44:56,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:44:56,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 10:44:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:56,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-06 10:44:56,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242420738] [2021-05-06 10:44:56,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79104210] [2021-05-06 10:44:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79104210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:56,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:56,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:44:56,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133354354] [2021-05-06 10:44:56,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:44:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:44:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:44:56,344 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:44:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:56,505 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-05-06 10:44:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:44:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-06 10:44:56,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:56,506 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:44:56,506 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:44:56,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:44:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:44:56,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 10:44:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 7 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:44:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-05-06 10:44:56,510 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 75 [2021-05-06 10:44:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:56,511 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-05-06 10:44:56,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-06 10:44:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-05-06 10:44:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 10:44:56,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:56,514 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:44:56,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:44:56,721 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 252865655, now seen corresponding path program 7 times [2021-05-06 10:44:56,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:56,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367802776] [2021-05-06 10:44:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:56,727 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:56,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317892454] [2021-05-06 10:44:56,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:44:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 10:44:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:57,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 10:44:57,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367802776] [2021-05-06 10:44:57,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317892454] [2021-05-06 10:44:57,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317892454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:57,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:57,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:44:57,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092316568] [2021-05-06 10:44:57,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:44:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:44:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:44:57,623 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:44:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:57,807 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 10:44:57,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:44:57,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 82 [2021-05-06 10:44:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:57,808 INFO L225 Difference]: With dead ends: 62 [2021-05-06 10:44:57,809 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 10:44:57,809 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:44:57,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 10:44:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 10:44:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:44:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 10:44:57,813 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 82 [2021-05-06 10:44:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:57,813 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 10:44:57,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-05-06 10:44:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 10:44:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 10:44:57,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:57,815 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:44:58,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 10:44:58,020 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 288751971, now seen corresponding path program 8 times [2021-05-06 10:44:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369641991] [2021-05-06 10:44:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:58,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:58,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122219963] [2021-05-06 10:44:58,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:58,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:44:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:44:58,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 10:44:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:44:58,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:58,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:58,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:44:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-05-06 10:44:59,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:44:59,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369641991] [2021-05-06 10:44:59,052 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:44:59,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122219963] [2021-05-06 10:44:59,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122219963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:44:59,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:44:59,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:44:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746998357] [2021-05-06 10:44:59,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:44:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:44:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:44:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:44:59,056 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:44:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:44:59,261 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-06 10:44:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:44:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 89 [2021-05-06 10:44:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:44:59,262 INFO L225 Difference]: With dead ends: 65 [2021-05-06 10:44:59,262 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 10:44:59,262 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:44:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 10:44:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 10:44:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:44:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 10:44:59,266 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 89 [2021-05-06 10:44:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:44:59,267 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 10:44:59,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-05-06 10:44:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 10:44:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 10:44:59,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:44:59,268 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:44:59,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:44:59,496 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:44:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:44:59,497 INFO L82 PathProgramCache]: Analyzing trace with hash -482784521, now seen corresponding path program 9 times [2021-05-06 10:44:59,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:44:59,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876523257] [2021-05-06 10:44:59,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:44:59,506 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:44:59,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003730223] [2021-05-06 10:44:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true