/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:45:06,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:45:06,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:45:06,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:45:06,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:45:06,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:45:06,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:45:06,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:45:06,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:45:06,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:45:06,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:45:06,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:45:06,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:45:06,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:45:06,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:45:06,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:45:06,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:45:06,614 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:45:06,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:45:06,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:45:06,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:45:06,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:45:06,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:45:06,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:45:06,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:45:06,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:45:06,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:45:06,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:45:06,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:45:06,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:45:06,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:45:06,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:45:06,651 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:45:06,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:45:06,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:45:06,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:45:06,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:45:06,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:45:06,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:45:06,654 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:45:06,654 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:45:06,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:45:06,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:45:06,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:45:06,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:45:06,908 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:45:06,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-06 08:45:06,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293511a71/7c72df7bf7d84e88a7885337f21a506c/FLAG534fa2a24 [2021-05-06 08:45:07,318 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:45:07,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound100.c [2021-05-06 08:45:07,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293511a71/7c72df7bf7d84e88a7885337f21a506c/FLAG534fa2a24 [2021-05-06 08:45:07,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293511a71/7c72df7bf7d84e88a7885337f21a506c [2021-05-06 08:45:07,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:45:07,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:45:07,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:45:07,743 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:45:07,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:45:07,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:45:07" (1/1) ... [2021-05-06 08:45:07,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35802c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:07, skipping insertion in model container [2021-05-06 08:45:07,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:45:07" (1/1) ... [2021-05-06 08:45:07,750 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:45:07,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:45:07,926 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/hard-ll_unwindbound100.c[546,559] [2021-05-06 08:45:07,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:45:07,964 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:45:07,983 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/hard-ll_unwindbound100.c[546,559] [2021-05-06 08:45:07,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:45:08,005 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:45:08,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08 WrapperNode [2021-05-06 08:45:08,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:45:08,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:45:08,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:45:08,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:45:08,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:45:08,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:45:08,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:45:08,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:45:08,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:45:08,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:45:08,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:45:08,192 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:45:08,192 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:45:08,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:45:08,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:45:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:45:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:45:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:45:08,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:45:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:45:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:45:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:45:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:45:08,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:45:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:45:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:45:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:45:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:45:08,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:45:08,402 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:45:08,402 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:45:08,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:45:08 BoogieIcfgContainer [2021-05-06 08:45:08,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:45:08,404 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:45:08,404 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:45:08,404 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:45:08,406 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:45:08" (1/1) ... [2021-05-06 08:45:08,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:45:08 BasicIcfg [2021-05-06 08:45:08,415 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:45:08,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:45:08,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:45:08,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:45:08,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:45:07" (1/4) ... [2021-05-06 08:45:08,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df8f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:45:08, skipping insertion in model container [2021-05-06 08:45:08,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:45:08" (2/4) ... [2021-05-06 08:45:08,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df8f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:45:08, skipping insertion in model container [2021-05-06 08:45:08,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:45:08" (3/4) ... [2021-05-06 08:45:08,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44df8f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:45:08, skipping insertion in model container [2021-05-06 08:45:08,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:45:08" (4/4) ... [2021-05-06 08:45:08,440 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound100.cJordan [2021-05-06 08:45:08,443 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:45:08,446 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:45:08,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:45:08,493 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:45:08,493 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:45:08,493 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:45:08,493 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:45:08,493 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:45:08,493 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:45:08,493 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:45:08,493 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:45:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:45:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:45:08,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:08,519 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:08,520 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:45:08,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:08,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571219494] [2021-05-06 08:45:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:08,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:45:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:08,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:45:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:45:08,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:08,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571219494] [2021-05-06 08:45:08,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571219494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:08,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:08,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:45:08,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083714718] [2021-05-06 08:45:08,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:45:08,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:08,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:45:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:45:08,802 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:45:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:08,945 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:45:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:45:08,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:45:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:08,951 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:45:08,951 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:45:08,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:45:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:45:08,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:45:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:45:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:45:08,991 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:45:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:08,991 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:45:08,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:45:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:45:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:45:08,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:08,992 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:08,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:45:08,992 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:08,993 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:45:08,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:08,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991052874] [2021-05-06 08:45:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:45:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:45:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:45:09,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:09,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991052874] [2021-05-06 08:45:09,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991052874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:09,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:09,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:45:09,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815777425] [2021-05-06 08:45:09,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:45:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:45:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:09,128 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:45:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:09,384 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:45:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:45:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:09,386 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:45:09,386 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:45:09,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:09,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:45:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:45:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:45:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:45:09,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:45:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:09,394 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:45:09,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:45:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:45:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:45:09,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:09,395 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:09,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:45:09,395 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:45:09,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:09,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279383161] [2021-05-06 08:45:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:09,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:09,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711136856] [2021-05-06 08:45:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:45:09,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:09,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:09,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:09,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:09,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:45:09,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279383161] [2021-05-06 08:45:09,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:09,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711136856] [2021-05-06 08:45:09,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711136856] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:09,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:09,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:45:09,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893748388] [2021-05-06 08:45:09,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:45:09,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:09,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:45:09,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:45:09,611 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:45:09,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:09,632 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:45:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:45:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:45:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:09,633 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:45:09,633 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:45:09,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:45:09,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:45:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:45:09,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:45:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:45:09,637 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:45:09,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:09,637 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:45:09,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:45:09,637 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:45:09,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:45:09,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:09,638 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:09,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:45:09,853 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:45:09,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:09,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120930317] [2021-05-06 08:45:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:45:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:45:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:45:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:45:09,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:09,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120930317] [2021-05-06 08:45:09,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120930317] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:09,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:09,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:45:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373339436] [2021-05-06 08:45:09,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:45:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:45:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:09,931 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:45:10,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:10,104 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:45:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:10,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:45:10,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:10,106 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:45:10,106 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:45:10,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:10,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:45:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:45:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:45:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:45:10,110 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:45:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:10,111 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:45:10,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:45:10,111 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:45:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:45:10,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:10,111 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:10,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:45:10,112 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:45:10,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:10,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536521164] [2021-05-06 08:45:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:10,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:10,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587864927] [2021-05-06 08:45:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:10,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:45:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:10,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:45:10,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536521164] [2021-05-06 08:45:10,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587864927] [2021-05-06 08:45:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587864927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:10,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:10,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:45:10,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910388369] [2021-05-06 08:45:10,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:45:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:45:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:45:10,297 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:45:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:10,336 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-06 08:45:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:45:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:45:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:10,337 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:45:10,337 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:45:10,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:45:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:45:10,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:45:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 08:45:10,342 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 08:45:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:10,342 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 08:45:10,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:45:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 08:45:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:45:10,343 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:10,343 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:10,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:10,560 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:10,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:45:10,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:10,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551279436] [2021-05-06 08:45:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:10,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965262055] [2021-05-06 08:45:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:10,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:45:10,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:10,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:45:10,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551279436] [2021-05-06 08:45:10,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965262055] [2021-05-06 08:45:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965262055] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:10,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:10,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:45:10,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398252810] [2021-05-06 08:45:10,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:45:10,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:10,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:45:10,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:45:10,719 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:45:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:10,739 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 08:45:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:45:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:45:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:10,740 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:45:10,740 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:45:10,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:45:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:45:10,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:45:10,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:45:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 08:45:10,744 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 08:45:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:10,744 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 08:45:10,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:45:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 08:45:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:45:10,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:10,745 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:10,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:10,962 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:10,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:10,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:45:10,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:10,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758072756] [2021-05-06 08:45:10,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:10,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314716486] [2021-05-06 08:45:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:11,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:45:11,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:45:11,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:11,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758072756] [2021-05-06 08:45:11,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:11,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314716486] [2021-05-06 08:45:11,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314716486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:11,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:11,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:45:11,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40094914] [2021-05-06 08:45:11,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:45:11,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:45:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:11,162 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:45:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:11,225 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-06 08:45:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:45:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:45:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:11,226 INFO L225 Difference]: With dead ends: 72 [2021-05-06 08:45:11,227 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:45:11,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:11,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:45:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:45:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:45:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:45:11,230 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 08:45:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:11,230 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:45:11,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:45:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:45:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:45:11,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:11,231 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:11,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:11,447 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:45:11,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:11,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676627263] [2021-05-06 08:45:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:11,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:11,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924411572] [2021-05-06 08:45:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:45:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:11,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:11,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:45:11,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:11,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676627263] [2021-05-06 08:45:11,623 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:11,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924411572] [2021-05-06 08:45:11,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924411572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:11,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:11,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:45:11,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137963058] [2021-05-06 08:45:11,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:45:11,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:11,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:45:11,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:45:11,624 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:45:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:11,649 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-06 08:45:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:45:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:45:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:11,650 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:45:11,650 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:45:11,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:45:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 08:45:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:45:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 08:45:11,656 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 08:45:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:11,656 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 08:45:11,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:45:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 08:45:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:45:11,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:11,657 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:11,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:11,875 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:45:11,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:11,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551990406] [2021-05-06 08:45:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:11,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:11,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726807466] [2021-05-06 08:45:11,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:45:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:45:12,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551990406] [2021-05-06 08:45:12,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:12,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726807466] [2021-05-06 08:45:12,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726807466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:12,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:12,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:45:12,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836380400] [2021-05-06 08:45:12,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:45:12,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:45:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:45:12,098 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:45:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:12,214 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-05-06 08:45:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:45:12,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:45:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:12,215 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:45:12,216 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:45:12,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:45:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:45:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 08:45:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:45:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 08:45:12,222 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 08:45:12,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:12,222 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 08:45:12,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:45:12,222 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 08:45:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:45:12,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:12,223 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:12,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:12,438 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-06 08:45:12,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:12,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508464100] [2021-05-06 08:45:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:12,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:12,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722888806] [2021-05-06 08:45:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:12,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:45:12,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:45:12,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508464100] [2021-05-06 08:45:12,570 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:12,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722888806] [2021-05-06 08:45:12,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722888806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:12,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:12,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:45:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073240770] [2021-05-06 08:45:12,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:45:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:45:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:12,572 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:45:12,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:12,599 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-06 08:45:12,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:45:12,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 08:45:12,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:12,600 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:45:12,600 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:45:12,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:45:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:45:12,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:45:12,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 08:45:12,604 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 08:45:12,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:12,604 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 08:45:12,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:45:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 08:45:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:45:12,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:12,605 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:12,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:45:12,824 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:12,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-06 08:45:12,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:12,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303923389] [2021-05-06 08:45:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:12,830 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:12,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117248733] [2021-05-06 08:45:12,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:12,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:45:12,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:12,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:45:13,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303923389] [2021-05-06 08:45:13,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117248733] [2021-05-06 08:45:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117248733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:45:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595416678] [2021-05-06 08:45:13,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:45:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:45:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:45:13,068 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:45:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:13,195 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-05-06 08:45:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 08:45:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:13,196 INFO L225 Difference]: With dead ends: 102 [2021-05-06 08:45:13,196 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:45:13,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:45:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 08:45:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:45:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 08:45:13,200 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 08:45:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:13,200 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 08:45:13,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:45:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 08:45:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:45:13,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:13,201 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:13,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:45:13,417 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-06 08:45:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:13,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657731220] [2021-05-06 08:45:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:13,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:13,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931915747] [2021-05-06 08:45:13,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:13,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 08:45:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:45:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:13,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 08:45:13,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:13,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657731220] [2021-05-06 08:45:13,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:13,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931915747] [2021-05-06 08:45:13,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931915747] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:45:13,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:45:13,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:45:13,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070986595] [2021-05-06 08:45:13,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:45:13,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:13,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:45:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:45:13,558 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:45:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:13,591 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-05-06 08:45:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:45:13,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 08:45:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:13,592 INFO L225 Difference]: With dead ends: 108 [2021-05-06 08:45:13,592 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 08:45:13,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 08:45:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 08:45:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:45:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 08:45:13,596 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 08:45:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:13,596 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 08:45:13,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:45:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 08:45:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:45:13,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:13,597 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:13,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:13,813 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:13,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-06 08:45:13,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:13,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19893521] [2021-05-06 08:45:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:13,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:13,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138505217] [2021-05-06 08:45:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:45:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 08:45:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19893521] [2021-05-06 08:45:13,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138505217] [2021-05-06 08:45:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138505217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:13,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:13,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:45:13,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118600674] [2021-05-06 08:45:13,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:45:13,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:45:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:45:13,946 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:45:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:13,998 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-05-06 08:45:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 08:45:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:13,999 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:45:13,999 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:45:14,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:45:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 08:45:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:45:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 08:45:14,003 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 08:45:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:14,003 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 08:45:14,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:45:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 08:45:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:45:14,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:14,004 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:14,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:14,221 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-06 08:45:14,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:14,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058450305] [2021-05-06 08:45:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:14,226 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:14,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418158] [2021-05-06 08:45:14,226 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:14,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:45:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:45:14,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:14,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 08:45:14,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058450305] [2021-05-06 08:45:14,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418158] [2021-05-06 08:45:14,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:14,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:14,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:45:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554079017] [2021-05-06 08:45:14,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:45:14,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:14,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:45:14,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:45:14,433 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:45:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:14,554 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2021-05-06 08:45:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:45:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 08:45:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:14,555 INFO L225 Difference]: With dead ends: 153 [2021-05-06 08:45:14,555 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:45:14,556 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:14,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:45:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 08:45:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:45:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 08:45:14,560 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 08:45:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:14,560 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 08:45:14,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:45:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 08:45:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:45:14,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:14,561 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:14,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:45:14,777 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-06 08:45:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:14,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879126029] [2021-05-06 08:45:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:14,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:14,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137833409] [2021-05-06 08:45:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:14,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:45:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:14,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:45:14,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879126029] [2021-05-06 08:45:14,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137833409] [2021-05-06 08:45:14,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137833409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:14,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:14,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:45:14,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637933898] [2021-05-06 08:45:14,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:45:14,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:14,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:45:14,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:45:14,952 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:45:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:15,010 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-05-06 08:45:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:15,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 08:45:15,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:15,011 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:45:15,011 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:45:15,012 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:45:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 08:45:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:45:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 08:45:15,015 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 08:45:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:15,016 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 08:45:15,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:45:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 08:45:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:45:15,016 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:15,016 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:15,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:45:15,233 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:15,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:15,233 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-06 08:45:15,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:15,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323819191] [2021-05-06 08:45:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:15,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:15,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421194880] [2021-05-06 08:45:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:45:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:15,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:45:15,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323819191] [2021-05-06 08:45:15,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:15,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421194880] [2021-05-06 08:45:15,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421194880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:15,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:15,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:45:15,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030468770] [2021-05-06 08:45:15,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:45:15,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:15,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:45:15,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:45:15,638 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:45:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:15,831 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2021-05-06 08:45:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:45:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 08:45:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:15,832 INFO L225 Difference]: With dead ends: 161 [2021-05-06 08:45:15,833 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:45:15,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:45:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:45:15,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 08:45:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:45:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 08:45:15,837 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 08:45:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:15,837 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 08:45:15,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:45:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 08:45:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:45:15,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:15,838 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:16,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:45:16,056 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-06 08:45:16,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:16,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976750939] [2021-05-06 08:45:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:16,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:16,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187563373] [2021-05-06 08:45:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:45:16,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:45:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 08:45:16,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976750939] [2021-05-06 08:45:16,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:16,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187563373] [2021-05-06 08:45:16,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187563373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:16,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:16,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:45:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390368507] [2021-05-06 08:45:16,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:45:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:16,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:45:16,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:45:16,327 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:45:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:16,412 INFO L93 Difference]: Finished difference Result 180 states and 215 transitions. [2021-05-06 08:45:16,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:45:16,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 79 [2021-05-06 08:45:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:16,413 INFO L225 Difference]: With dead ends: 180 [2021-05-06 08:45:16,413 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 08:45:16,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:45:16,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 08:45:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2021-05-06 08:45:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 98 states have internal predecessors, (111), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:45:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 177 transitions. [2021-05-06 08:45:16,418 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 177 transitions. Word has length 79 [2021-05-06 08:45:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:16,418 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 177 transitions. [2021-05-06 08:45:16,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:45:16,418 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 177 transitions. [2021-05-06 08:45:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:45:16,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:16,419 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:16,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:16,636 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1708320559, now seen corresponding path program 2 times [2021-05-06 08:45:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:16,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509669732] [2021-05-06 08:45:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:16,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:16,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013359648] [2021-05-06 08:45:16,641 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:16,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:45:16,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:45:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:16,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:45:16,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509669732] [2021-05-06 08:45:16,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013359648] [2021-05-06 08:45:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013359648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:45:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848753541] [2021-05-06 08:45:16,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:45:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:45:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:45:16,835 INFO L87 Difference]: Start difference. First operand 146 states and 177 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:45:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:16,890 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2021-05-06 08:45:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:45:16,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 08:45:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:16,891 INFO L225 Difference]: With dead ends: 148 [2021-05-06 08:45:16,891 INFO L226 Difference]: Without dead ends: 148 [2021-05-06 08:45:16,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-06 08:45:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-06 08:45:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 100 states have internal predecessors, (113), 35 states have call successors, (35), 18 states have call predecessors, (35), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:45:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-05-06 08:45:16,897 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 79 [2021-05-06 08:45:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:16,897 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-05-06 08:45:16,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:45:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-05-06 08:45:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:45:16,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:16,898 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:17,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:45:17,116 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:17,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:17,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1815149533, now seen corresponding path program 3 times [2021-05-06 08:45:17,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:17,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357281981] [2021-05-06 08:45:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:17,131 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:17,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454968455] [2021-05-06 08:45:17,131 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:17,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:45:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:45:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:17,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:17,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:17,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 08:45:17,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:17,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357281981] [2021-05-06 08:45:17,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:17,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454968455] [2021-05-06 08:45:17,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454968455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:17,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:17,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:45:17,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239414360] [2021-05-06 08:45:17,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:45:17,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:45:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:17,401 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:45:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:17,899 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2021-05-06 08:45:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:45:17,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 08:45:17,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:17,905 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:45:17,905 INFO L226 Difference]: Without dead ends: 176 [2021-05-06 08:45:17,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-06 08:45:17,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 170. [2021-05-06 08:45:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 109 states have (on average 1.201834862385321) internal successors, (131), 116 states have internal predecessors, (131), 41 states have call successors, (41), 20 states have call predecessors, (41), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:45:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 209 transitions. [2021-05-06 08:45:17,914 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 209 transitions. Word has length 82 [2021-05-06 08:45:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:17,914 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 209 transitions. [2021-05-06 08:45:17,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:45:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 209 transitions. [2021-05-06 08:45:17,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:45:17,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:17,915 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:18,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:18,131 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:18,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1960725647, now seen corresponding path program 2 times [2021-05-06 08:45:18,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:18,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171282716] [2021-05-06 08:45:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:18,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:18,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091153959] [2021-05-06 08:45:18,145 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:18,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:45:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:45:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:18,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:45:18,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171282716] [2021-05-06 08:45:18,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:18,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091153959] [2021-05-06 08:45:18,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091153959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:18,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:18,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:45:18,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422015402] [2021-05-06 08:45:18,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:45:18,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:45:18,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:18,319 INFO L87 Difference]: Start difference. First operand 170 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:45:18,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:18,385 INFO L93 Difference]: Finished difference Result 197 states and 233 transitions. [2021-05-06 08:45:18,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:45:18,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 08:45:18,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:18,387 INFO L225 Difference]: With dead ends: 197 [2021-05-06 08:45:18,387 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 08:45:18,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:45:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 08:45:18,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-06 08:45:18,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 134 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 08:45:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2021-05-06 08:45:18,392 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 86 [2021-05-06 08:45:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:18,392 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2021-05-06 08:45:18,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:45:18,393 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2021-05-06 08:45:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:45:18,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:18,393 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:18,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:18,610 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:18,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1959623380, now seen corresponding path program 2 times [2021-05-06 08:45:18,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:18,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867739261] [2021-05-06 08:45:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:18,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:18,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655774093] [2021-05-06 08:45:18,618 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:18,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:45:18,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:45:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:19,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:45:19,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867739261] [2021-05-06 08:45:19,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:19,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655774093] [2021-05-06 08:45:19,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655774093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:19,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:19,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:45:19,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139253794] [2021-05-06 08:45:19,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:45:19,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:45:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:45:19,046 INFO L87 Difference]: Start difference. First operand 196 states and 232 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:45:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:19,640 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2021-05-06 08:45:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:45:19,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 08:45:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:19,641 INFO L225 Difference]: With dead ends: 197 [2021-05-06 08:45:19,641 INFO L226 Difference]: Without dead ends: 197 [2021-05-06 08:45:19,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:45:19,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-06 08:45:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-05-06 08:45:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 133 states have internal predecessors, (146), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:45:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 227 transitions. [2021-05-06 08:45:19,645 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 227 transitions. Word has length 86 [2021-05-06 08:45:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:19,646 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 227 transitions. [2021-05-06 08:45:19,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:45:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 227 transitions. [2021-05-06 08:45:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:45:19,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:19,646 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:19,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:45:19,857 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:19,857 INFO L82 PathProgramCache]: Analyzing trace with hash 31379631, now seen corresponding path program 3 times [2021-05-06 08:45:19,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:19,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935397935] [2021-05-06 08:45:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:19,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:19,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080238947] [2021-05-06 08:45:19,862 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:19,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:45:19,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:45:19,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:20,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 08:45:20,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:20,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935397935] [2021-05-06 08:45:20,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:20,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080238947] [2021-05-06 08:45:20,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080238947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:20,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:20,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:45:20,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802802799] [2021-05-06 08:45:20,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:45:20,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:45:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:45:20,139 INFO L87 Difference]: Start difference. First operand 194 states and 227 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:45:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:20,214 INFO L93 Difference]: Finished difference Result 196 states and 229 transitions. [2021-05-06 08:45:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:45:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 08:45:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:20,215 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:45:20,215 INFO L226 Difference]: Without dead ends: 196 [2021-05-06 08:45:20,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:45:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-06 08:45:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-05-06 08:45:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 128 states have (on average 1.15625) internal successors, (148), 135 states have internal predecessors, (148), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (39), 34 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 08:45:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2021-05-06 08:45:20,220 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 97 [2021-05-06 08:45:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:20,221 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2021-05-06 08:45:20,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:45:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2021-05-06 08:45:20,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:45:20,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:20,221 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:20,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:20,438 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:20,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:20,439 INFO L82 PathProgramCache]: Analyzing trace with hash -874901792, now seen corresponding path program 3 times [2021-05-06 08:45:20,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:20,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263281297] [2021-05-06 08:45:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:20,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:20,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889658347] [2021-05-06 08:45:20,447 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:20,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:45:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:45:20,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:20,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:20,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:21,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:21,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:21,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 08:45:21,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263281297] [2021-05-06 08:45:21,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:21,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889658347] [2021-05-06 08:45:21,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889658347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:21,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:21,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:45:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173255879] [2021-05-06 08:45:21,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:45:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:45:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:45:21,190 INFO L87 Difference]: Start difference. First operand 196 states and 229 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:45:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:22,253 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2021-05-06 08:45:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:45:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:45:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:22,254 INFO L225 Difference]: With dead ends: 207 [2021-05-06 08:45:22,254 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:45:22,254 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:45:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:45:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-05-06 08:45:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 122 states have (on average 1.139344262295082) internal successors, (139), 128 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 08:45:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2021-05-06 08:45:22,258 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 100 [2021-05-06 08:45:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:22,258 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2021-05-06 08:45:22,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:45:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2021-05-06 08:45:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:45:22,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:22,259 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:22,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:45:22,479 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:22,480 INFO L82 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2021-05-06 08:45:22,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:22,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203264488] [2021-05-06 08:45:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:22,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:22,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058909117] [2021-05-06 08:45:22,484 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:23,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:45:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:45:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:23,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 08:45:23,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203264488] [2021-05-06 08:45:23,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058909117] [2021-05-06 08:45:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058909117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:23,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:23,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:45:23,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149451687] [2021-05-06 08:45:23,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:45:23,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:23,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:45:23,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:45:23,830 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:45:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:24,230 INFO L93 Difference]: Finished difference Result 190 states and 217 transitions. [2021-05-06 08:45:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:45:24,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:45:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:24,231 INFO L225 Difference]: With dead ends: 190 [2021-05-06 08:45:24,231 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 08:45:24,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:45:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 08:45:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 08:45:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 105 states have internal predecessors, (116), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:45:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-05-06 08:45:24,234 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 100 [2021-05-06 08:45:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:24,235 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-05-06 08:45:24,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:45:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-05-06 08:45:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:45:24,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:24,236 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:24,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:45:24,442 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:24,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1453917651, now seen corresponding path program 4 times [2021-05-06 08:45:24,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:24,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117271120] [2021-05-06 08:45:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:24,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:24,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265832897] [2021-05-06 08:45:24,453 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:24,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:45:24,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:45:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:24,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 28 proven. 350 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:45:24,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:24,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117271120] [2021-05-06 08:45:24,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:24,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265832897] [2021-05-06 08:45:24,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265832897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:24,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:24,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:45:24,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612611545] [2021-05-06 08:45:24,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:45:24,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:24,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:45:24,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:45:24,666 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:45:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:24,737 INFO L93 Difference]: Finished difference Result 186 states and 216 transitions. [2021-05-06 08:45:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:45:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 08:45:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:24,739 INFO L225 Difference]: With dead ends: 186 [2021-05-06 08:45:24,739 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 08:45:24,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 08:45:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-06 08:45:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 121 states have (on average 1.1487603305785123) internal successors, (139), 126 states have internal predecessors, (139), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:45:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2021-05-06 08:45:24,746 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 104 [2021-05-06 08:45:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:24,746 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2021-05-06 08:45:24,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 8 states have call successors, (18), 8 states have call predecessors, (18), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 08:45:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2021-05-06 08:45:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:45:24,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:24,747 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:24,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:24,963 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:24,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:24,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1455019918, now seen corresponding path program 4 times [2021-05-06 08:45:24,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:24,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170072150] [2021-05-06 08:45:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:24,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:24,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644359879] [2021-05-06 08:45:24,972 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:25,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:45:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:45:25,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:25,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 08:45:25,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170072150] [2021-05-06 08:45:25,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:25,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644359879] [2021-05-06 08:45:25,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644359879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:25,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:25,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:45:25,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295772857] [2021-05-06 08:45:25,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:45:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:45:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:45:25,367 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:45:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:25,603 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2021-05-06 08:45:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:45:25,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 08:45:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:25,604 INFO L225 Difference]: With dead ends: 203 [2021-05-06 08:45:25,604 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 08:45:25,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:45:25,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 08:45:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 08:45:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:45:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 235 transitions. [2021-05-06 08:45:25,609 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 235 transitions. Word has length 104 [2021-05-06 08:45:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:25,610 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 235 transitions. [2021-05-06 08:45:25,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:45:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 235 transitions. [2021-05-06 08:45:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 08:45:25,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:25,611 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:25,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:45:25,827 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1693551885, now seen corresponding path program 4 times [2021-05-06 08:45:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:25,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228295287] [2021-05-06 08:45:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:25,837 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:25,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806380309] [2021-05-06 08:45:25,837 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:25,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:45:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:45:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:25,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:25,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 90 proven. 430 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-05-06 08:45:26,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:26,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228295287] [2021-05-06 08:45:26,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:26,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806380309] [2021-05-06 08:45:26,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806380309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:26,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:26,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:45:26,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114901905] [2021-05-06 08:45:26,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:45:26,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:26,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:45:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:45:26,047 INFO L87 Difference]: Start difference. First operand 200 states and 235 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:45:26,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:26,146 INFO L93 Difference]: Finished difference Result 202 states and 237 transitions. [2021-05-06 08:45:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:45:26,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 115 [2021-05-06 08:45:26,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:26,147 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:45:26,147 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:45:26,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:45:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:45:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 08:45:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 137 states have internal predecessors, (153), 43 states have call successors, (43), 27 states have call predecessors, (43), 26 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:45:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 237 transitions. [2021-05-06 08:45:26,151 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 237 transitions. Word has length 115 [2021-05-06 08:45:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:26,152 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 237 transitions. [2021-05-06 08:45:26,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 8 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:45:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 237 transitions. [2021-05-06 08:45:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:45:26,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:26,162 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:26,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:26,378 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash 220761538, now seen corresponding path program 5 times [2021-05-06 08:45:26,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:26,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921091801] [2021-05-06 08:45:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:26,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:26,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481347544] [2021-05-06 08:45:26,385 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:26,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:45:26,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:26,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:45:26,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:26,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 32 proven. 470 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-05-06 08:45:26,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:26,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921091801] [2021-05-06 08:45:26,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:26,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481347544] [2021-05-06 08:45:26,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481347544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:26,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:26,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:45:26,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793692599] [2021-05-06 08:45:26,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:45:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:45:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:45:26,665 INFO L87 Difference]: Start difference. First operand 202 states and 237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:45:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:26,767 INFO L93 Difference]: Finished difference Result 254 states and 291 transitions. [2021-05-06 08:45:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:45:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2021-05-06 08:45:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:26,768 INFO L225 Difference]: With dead ends: 254 [2021-05-06 08:45:26,769 INFO L226 Difference]: Without dead ends: 252 [2021-05-06 08:45:26,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:45:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-06 08:45:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-05-06 08:45:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 166 states have (on average 1.144578313253012) internal successors, (190), 171 states have internal predecessors, (190), 50 states have call successors, (50), 34 states have call predecessors, (50), 32 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 08:45:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-05-06 08:45:26,773 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 118 [2021-05-06 08:45:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:26,773 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-05-06 08:45:26,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 9 states have call successors, (20), 9 states have call predecessors, (20), 7 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-06 08:45:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-05-06 08:45:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:45:26,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:26,774 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:26,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:45:26,989 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash 221863805, now seen corresponding path program 5 times [2021-05-06 08:45:26,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:26,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086949911] [2021-05-06 08:45:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:26,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:26,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249451011] [2021-05-06 08:45:26,994 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:27,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:45:27,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 08:45:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:27,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 104 proven. 93 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-06 08:45:27,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:45:27,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086949911] [2021-05-06 08:45:27,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:45:27,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249451011] [2021-05-06 08:45:27,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249451011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:45:27,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:45:27,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:45:27,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550788551] [2021-05-06 08:45:27,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:45:27,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:45:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:45:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:45:27,623 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:45:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:45:28,112 INFO L93 Difference]: Finished difference Result 264 states and 306 transitions. [2021-05-06 08:45:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:45:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 118 [2021-05-06 08:45:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:45:28,114 INFO L225 Difference]: With dead ends: 264 [2021-05-06 08:45:28,114 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 08:45:28,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:45:28,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 08:45:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2021-05-06 08:45:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 180 states have internal predecessors, (201), 52 states have call successors, (52), 35 states have call predecessors, (52), 34 states have return successors, (50), 46 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 08:45:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 303 transitions. [2021-05-06 08:45:28,125 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 303 transitions. Word has length 118 [2021-05-06 08:45:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:45:28,125 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 303 transitions. [2021-05-06 08:45:28,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 08:45:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 303 transitions. [2021-05-06 08:45:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 08:45:28,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:45:28,126 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:45:28,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 08:45:28,342 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:45:28,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:45:28,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1024071024, now seen corresponding path program 6 times [2021-05-06 08:45:28,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:45:28,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475583742] [2021-05-06 08:45:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:45:28,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:45:28,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372785079] [2021-05-06 08:45:28,353 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:45:28,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:45:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:45:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 08:45:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:45:28,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:28,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:28,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:45:28,598 WARN L159 QuantifierPusher]: Ignoring assumption.