/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:13,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:13,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:13,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:22:13,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:13,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:13,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:13,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:13,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:13,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:13,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:13,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:13,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:13,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:13,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:13,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:13,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:13,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:13,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:13,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:13,305 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:13,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:13,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:13,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:13,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:13,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:13,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:13,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:13,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:13,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:13,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:13,322 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:13,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:13,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:13,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:13,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:13,342 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:13,342 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:13,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:13,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:13,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:13,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:13,607 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:13,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-06 08:22:13,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4694ba3ed/18476011c70f4b999c755d339299975f/FLAGa928273e6 [2021-05-06 08:22:13,967 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:13,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-06 08:22:13,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4694ba3ed/18476011c70f4b999c755d339299975f/FLAGa928273e6 [2021-05-06 08:22:14,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4694ba3ed/18476011c70f4b999c755d339299975f [2021-05-06 08:22:14,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:14,408 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:14,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:14,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:14,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:14,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dac118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14, skipping insertion in model container [2021-05-06 08:22:14,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:14,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:14,519 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/egcd3-ll_valuebound10.c[490,503] [2021-05-06 08:22:14,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:14,539 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:14,547 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/egcd3-ll_valuebound10.c[490,503] [2021-05-06 08:22:14,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:14,563 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:14,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14 WrapperNode [2021-05-06 08:22:14,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:14,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:14,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:14,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:14,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:14,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:14,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:14,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:14,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:14,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:14,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:14,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:14,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:14,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:14,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:14,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:14,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:14,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:14,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:14,981 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:14,981 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:14,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:14 BoogieIcfgContainer [2021-05-06 08:22:14,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:14,982 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:14,983 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:14,983 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:14,985 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:14" (1/1) ... [2021-05-06 08:22:15,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:15 BasicIcfg [2021-05-06 08:22:15,002 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:15,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:15,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:15,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:15,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:14" (1/4) ... [2021-05-06 08:22:15,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162aaaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:15, skipping insertion in model container [2021-05-06 08:22:15,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:14" (2/4) ... [2021-05-06 08:22:15,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162aaaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:15, skipping insertion in model container [2021-05-06 08:22:15,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:14" (3/4) ... [2021-05-06 08:22:15,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162aaaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:15, skipping insertion in model container [2021-05-06 08:22:15,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:15" (4/4) ... [2021-05-06 08:22:15,009 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cJordan [2021-05-06 08:22:15,014 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:15,017 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:15,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:15,039 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:15,039 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:15,039 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:15,039 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:15,039 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:15,039 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:15,039 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:15,039 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:15,052 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:15,053 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:15,053 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:15,056 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:15,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:15,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818375545] [2021-05-06 08:22:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:15,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:15,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818375545] [2021-05-06 08:22:15,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818375545] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:15,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:15,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:15,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864008880] [2021-05-06 08:22:15,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:15,308 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:15,440 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:15,442 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:15,446 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:15,446 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:15,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:15,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:15,486 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:15,487 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:15,487 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:15,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:15,489 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 08:22:15,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:15,489 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:15,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:15,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446384828] [2021-05-06 08:22:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:15,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:15,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539988819] [2021-05-06 08:22:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:15,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:15,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446384828] [2021-05-06 08:22:15,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:15,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539988819] [2021-05-06 08:22:15,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539988819] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:15,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:15,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:15,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58324212] [2021-05-06 08:22:15,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:15,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:15,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:15,768 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:15,887 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:15,889 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:15,890 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:15,890 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:15,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:15,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:15,896 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:15,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:15,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:15,896 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 08:22:16,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:16,105 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:16,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12705976] [2021-05-06 08:22:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:16,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682559505] [2021-05-06 08:22:16,116 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 08:22:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:22:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:16,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:16,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12705976] [2021-05-06 08:22:16,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:16,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682559505] [2021-05-06 08:22:16,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682559505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:16,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:16,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:16,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463854646] [2021-05-06 08:22:16,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:16,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:16,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:16,456 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:16,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:16,586 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-05-06 08:22:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:16,587 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:22:16,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:16,591 INFO L225 Difference]: With dead ends: 51 [2021-05-06 08:22:16,591 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 08:22:16,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 08:22:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 08:22:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:16,608 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:16,609 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:16,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:16,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:16,610 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 08:22:16,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:16,828 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:16,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537756960] [2021-05-06 08:22:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:16,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:16,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206092515] [2021-05-06 08:22:16,838 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 08:22:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:16,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,004 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:17,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537756960] [2021-05-06 08:22:17,004 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206092515] [2021-05-06 08:22:17,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206092515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:17,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750380702] [2021-05-06 08:22:17,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:17,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:17,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:17,006 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:17,167 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:17,170 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:17,170 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:17,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:17,191 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:17,191 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:17,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:17,194 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:17,194 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:17,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:17,401 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:17,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:17,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720774902] [2021-05-06 08:22:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:17,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:17,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687737711] [2021-05-06 08:22:17,411 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 08:22:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:17,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:17,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:17,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720774902] [2021-05-06 08:22:17,661 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:17,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687737711] [2021-05-06 08:22:17,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687737711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:17,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:17,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:17,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120345695] [2021-05-06 08:22:17,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:17,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:17,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:17,662 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:17,883 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:17,884 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:17,884 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:17,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:17,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:17,889 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:17,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:17,890 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:17,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:17,890 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 08:22:18,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:18,102 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:18,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:18,102 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:18,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:18,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849516008] [2021-05-06 08:22:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:18,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:18,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657039251] [2021-05-06 08:22:18,111 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 08:22:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:22:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:18,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:18,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849516008] [2021-05-06 08:22:18,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657039251] [2021-05-06 08:22:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657039251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:18,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:18,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7429948] [2021-05-06 08:22:18,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:18,373 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:18,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:18,623 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-06 08:22:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:18,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 08:22:18,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:18,626 INFO L225 Difference]: With dead ends: 103 [2021-05-06 08:22:18,626 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 08:22:18,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 08:22:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 08:22:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 08:22:18,651 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 08:22:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:18,651 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 08:22:18,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:18,652 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 08:22:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:18,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:18,653 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 08:22:18,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:18,876 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:18,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:18,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864373750] [2021-05-06 08:22:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:18,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:18,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306316525] [2021-05-06 08:22:18,885 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 08:22:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:18,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:18,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864373750] [2021-05-06 08:22:19,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306316525] [2021-05-06 08:22:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306316525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:19,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:19,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:19,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390854219] [2021-05-06 08:22:19,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:19,061 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:19,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:19,194 INFO L93 Difference]: Finished difference Result 105 states and 138 transitions. [2021-05-06 08:22:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:19,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:19,196 INFO L225 Difference]: With dead ends: 105 [2021-05-06 08:22:19,196 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 08:22:19,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 08:22:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 08:22:19,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:19,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 08:22:19,200 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 08:22:19,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:19,201 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 08:22:19,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 08:22:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:19,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:19,201 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:19,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:19,409 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:19,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:19,409 INFO L82 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2021-05-06 08:22:19,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:19,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163189452] [2021-05-06 08:22:19,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:19,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:19,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418144914] [2021-05-06 08:22:19,424 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 08:22:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:19,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:22:19,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:19,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:19,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:19,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163189452] [2021-05-06 08:22:19,600 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:19,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418144914] [2021-05-06 08:22:19,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418144914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:19,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:19,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798309335] [2021-05-06 08:22:19,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:19,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:19,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:19,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:19,602 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:19,701 INFO L93 Difference]: Finished difference Result 111 states and 143 transitions. [2021-05-06 08:22:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:22:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 08:22:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:19,704 INFO L225 Difference]: With dead ends: 111 [2021-05-06 08:22:19,704 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 08:22:19,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 08:22:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 08:22:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 08:22:19,716 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 08:22:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:19,716 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 08:22:19,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:22:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 08:22:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:19,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:19,720 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 08:22:19,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:19,933 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2021-05-06 08:22:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:19,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458719652] [2021-05-06 08:22:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:19,941 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:19,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343552199] [2021-05-06 08:22:19,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:22:19,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:19,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:22:19,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:20,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458719652] [2021-05-06 08:22:20,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343552199] [2021-05-06 08:22:20,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343552199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:20,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:20,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:20,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622105751] [2021-05-06 08:22:20,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:20,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:20,073 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,127 INFO L93 Difference]: Finished difference Result 110 states and 143 transitions. [2021-05-06 08:22:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 08:22:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,129 INFO L225 Difference]: With dead ends: 110 [2021-05-06 08:22:20,129 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 08:22:20,129 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 08:22:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 08:22:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 08:22:20,133 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 08:22:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,133 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 08:22:20,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 08:22:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:20,133 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,133 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 08:22:20,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:20,355 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:20,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:20,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:20,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121469295] [2021-05-06 08:22:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:20,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:20,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78823148] [2021-05-06 08:22:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:22:20,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121469295] [2021-05-06 08:22:20,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78823148] [2021-05-06 08:22:20,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78823148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:20,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:20,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:20,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602771068] [2021-05-06 08:22:20,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:20,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:20,490 INFO L87 Difference]: Start difference. First operand 90 states and 112 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:20,525 INFO L93 Difference]: Finished difference Result 128 states and 172 transitions. [2021-05-06 08:22:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:20,526 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 08:22:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:20,526 INFO L225 Difference]: With dead ends: 128 [2021-05-06 08:22:20,527 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 08:22:20,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 08:22:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 08:22:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:22:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 08:22:20,531 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 08:22:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:20,531 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 08:22:20,531 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:22:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 08:22:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:20,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:20,532 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:20,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:20,742 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 846041443, now seen corresponding path program 1 times [2021-05-06 08:22:20,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:20,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330044207] [2021-05-06 08:22:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:20,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:20,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743556778] [2021-05-06 08:22:20,751 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 08:22:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:22:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:20,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:20,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:20,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330044207] [2021-05-06 08:22:20,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:20,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743556778] [2021-05-06 08:22:20,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743556778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:20,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:20,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:20,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58637139] [2021-05-06 08:22:20,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:20,924 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:21,165 INFO L93 Difference]: Finished difference Result 164 states and 229 transitions. [2021-05-06 08:22:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:21,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 08:22:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:21,168 INFO L225 Difference]: With dead ends: 164 [2021-05-06 08:22:21,168 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 08:22:21,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 08:22:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 08:22:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 08:22:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 08:22:21,174 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 08:22:21,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:21,174 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 08:22:21,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:22:21,174 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 08:22:21,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:21,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:21,175 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:21,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:21,389 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:21,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:21,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:21,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32011766] [2021-05-06 08:22:21,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:21,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:21,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016237397] [2021-05-06 08:22:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:22:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:21,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:22:21,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32011766] [2021-05-06 08:22:21,719 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:21,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016237397] [2021-05-06 08:22:21,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016237397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:21,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:21,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:22:21,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437814553] [2021-05-06 08:22:21,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:22:21,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:21,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:22:21,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:21,720 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:22,052 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2021-05-06 08:22:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:22,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:22,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:22,056 INFO L225 Difference]: With dead ends: 176 [2021-05-06 08:22:22,056 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 08:22:22,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 08:22:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 08:22:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 08:22:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 08:22:22,079 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 08:22:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:22,079 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 08:22:22,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 08:22:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:22,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:22,080 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:22,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 08:22:22,281 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1523533001, now seen corresponding path program 2 times [2021-05-06 08:22:22,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:22,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864873742] [2021-05-06 08:22:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:22,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:22,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942833699] [2021-05-06 08:22:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:22,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:22,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:22,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864873742] [2021-05-06 08:22:22,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:22,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942833699] [2021-05-06 08:22:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942833699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:22,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:22,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015412100] [2021-05-06 08:22:22,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:22,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:22,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:22,455 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:22,749 INFO L93 Difference]: Finished difference Result 281 states and 417 transitions. [2021-05-06 08:22:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:22,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:22,751 INFO L225 Difference]: With dead ends: 281 [2021-05-06 08:22:22,751 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 08:22:22,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 08:22:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 08:22:22,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 08:22:22,760 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 08:22:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:22,761 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 08:22:22,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 08:22:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 08:22:22,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:22,761 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:22,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:22:22,977 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2021-05-06 08:22:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:22,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440389779] [2021-05-06 08:22:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:22,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:22,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326907877] [2021-05-06 08:22:22,983 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 08:22:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:22:23,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:23,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440389779] [2021-05-06 08:22:23,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:23,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326907877] [2021-05-06 08:22:23,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326907877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:23,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:23,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:22:23,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457653228] [2021-05-06 08:22:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:22:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:22:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:22:23,193 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:23,356 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2021-05-06 08:22:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:22:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-06 08:22:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:23,357 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:23,357 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:23,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 08:22:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 08:22:23,364 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 08:22:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:23,364 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 08:22:23,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 08:22:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 08:22:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:23,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:23,365 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:23,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:22:23,582 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2021-05-06 08:22:23,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:23,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825731854] [2021-05-06 08:22:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:23,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:23,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166556752] [2021-05-06 08:22:23,588 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 08:22:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:23,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:23,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 08:22:23,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:23,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825731854] [2021-05-06 08:22:23,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:23,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166556752] [2021-05-06 08:22:23,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166556752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:23,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:23,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:23,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346688533] [2021-05-06 08:22:23,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:23,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:23,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:23,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:23,763 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:23,854 INFO L93 Difference]: Finished difference Result 233 states and 320 transitions. [2021-05-06 08:22:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 08:22:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:23,856 INFO L225 Difference]: With dead ends: 233 [2021-05-06 08:22:23,856 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 08:22:23,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 08:22:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 08:22:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 08:22:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 08:22:23,863 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 08:22:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:23,864 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 08:22:23,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 08:22:23,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:23,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:23,865 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:24,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:24,083 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,084 INFO L82 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2021-05-06 08:22:24,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371249000] [2021-05-06 08:22:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282779025] [2021-05-06 08:22:24,095 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 08:22:24,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:24,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:22:24,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371249000] [2021-05-06 08:22:24,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282779025] [2021-05-06 08:22:24,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282779025] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:24,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:24,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:24,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936024899] [2021-05-06 08:22:24,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:24,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:24,255 INFO L87 Difference]: Start difference. First operand 233 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,287 INFO L93 Difference]: Finished difference Result 232 states and 304 transitions. [2021-05-06 08:22:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:24,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 08:22:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,288 INFO L225 Difference]: With dead ends: 232 [2021-05-06 08:22:24,288 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 08:22:24,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 08:22:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 08:22:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 08:22:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 08:22:24,297 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 08:22:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,297 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 08:22:24,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 08:22:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 08:22:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:24,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,298 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:24,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:22:24,505 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1813106047, now seen corresponding path program 3 times [2021-05-06 08:22:24,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355954222] [2021-05-06 08:22:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842504388] [2021-05-06 08:22:24,512 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 08:22:24,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:22:24,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:22:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:24,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:24,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355954222] [2021-05-06 08:22:24,676 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:24,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842504388] [2021-05-06 08:22:24,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842504388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:24,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:24,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:22:24,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305154559] [2021-05-06 08:22:24,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:22:24,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:24,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:22:24,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:22:24,677 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:24,715 INFO L93 Difference]: Finished difference Result 236 states and 317 transitions. [2021-05-06 08:22:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:22:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 08:22:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:24,717 INFO L225 Difference]: With dead ends: 236 [2021-05-06 08:22:24,717 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 08:22:24,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 08:22:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 08:22:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 08:22:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 08:22:24,725 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 08:22:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:24,725 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 08:22:24,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 08:22:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 08:22:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:22:24,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:24,726 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:24,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 08:22:24,941 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash -747783847, now seen corresponding path program 1 times [2021-05-06 08:22:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:24,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081270112] [2021-05-06 08:22:24,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:24,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:24,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325076760] [2021-05-06 08:22:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 08:22:25,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081270112] [2021-05-06 08:22:25,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:25,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325076760] [2021-05-06 08:22:25,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325076760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:25,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:25,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:22:25,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47823296] [2021-05-06 08:22:25,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:22:25,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:22:25,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:22:25,189 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:25,495 INFO L93 Difference]: Finished difference Result 309 states and 421 transitions. [2021-05-06 08:22:25,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:25,496 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 08:22:25,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:25,497 INFO L225 Difference]: With dead ends: 309 [2021-05-06 08:22:25,497 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 08:22:25,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 08:22:25,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 250. [2021-05-06 08:22:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 147 states have internal predecessors, (165), 87 states have call successors, (87), 21 states have call predecessors, (87), 20 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 337 transitions. [2021-05-06 08:22:25,504 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 337 transitions. Word has length 79 [2021-05-06 08:22:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:25,504 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 337 transitions. [2021-05-06 08:22:25,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 08:22:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 337 transitions. [2021-05-06 08:22:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 08:22:25,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:25,505 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:25,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:22:25,709 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 4 times [2021-05-06 08:22:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:25,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936712516] [2021-05-06 08:22:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:25,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:25,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241446557] [2021-05-06 08:22:25,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:22:25,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:22:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-06 08:22:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:25,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:22:26,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936712516] [2021-05-06 08:22:26,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241446557] [2021-05-06 08:22:26,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241446557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:26,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:26,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789388010] [2021-05-06 08:22:26,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:22:26,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:26,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:22:26,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:26,267 INFO L87 Difference]: Start difference. First operand 250 states and 337 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:22:26,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:26,788 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2021-05-06 08:22:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:26,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-06 08:22:26,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:26,790 INFO L225 Difference]: With dead ends: 315 [2021-05-06 08:22:26,790 INFO L226 Difference]: Without dead ends: 315 [2021-05-06 08:22:26,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-06 08:22:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-06 08:22:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 254. [2021-05-06 08:22:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 150 states have internal predecessors, (168), 87 states have call successors, (87), 22 states have call predecessors, (87), 21 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 08:22:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 340 transitions. [2021-05-06 08:22:26,797 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 340 transitions. Word has length 77 [2021-05-06 08:22:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:26,797 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 340 transitions. [2021-05-06 08:22:26,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:22:26,797 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 340 transitions. [2021-05-06 08:22:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:22:26,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:26,798 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:26,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:26,999 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2021-05-06 08:22:26,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:26,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793231051] [2021-05-06 08:22:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:27,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:27,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094632842] [2021-05-06 08:22:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 08:22:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 08:22:27,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:27,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793231051] [2021-05-06 08:22:27,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:27,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094632842] [2021-05-06 08:22:27,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094632842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:27,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:27,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:27,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2462986] [2021-05-06 08:22:27,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:27,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:27,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:27,407 INFO L87 Difference]: Start difference. First operand 254 states and 340 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:28,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:28,067 INFO L93 Difference]: Finished difference Result 339 states and 460 transitions. [2021-05-06 08:22:28,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:22:28,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 08:22:28,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:28,069 INFO L225 Difference]: With dead ends: 339 [2021-05-06 08:22:28,069 INFO L226 Difference]: Without dead ends: 338 [2021-05-06 08:22:28,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:22:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-06 08:22:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 319. [2021-05-06 08:22:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 184 states have internal predecessors, (211), 115 states have call successors, (115), 25 states have call predecessors, (115), 24 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 08:22:28,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 439 transitions. [2021-05-06 08:22:28,079 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 439 transitions. Word has length 86 [2021-05-06 08:22:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:28,079 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 439 transitions. [2021-05-06 08:22:28,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:22:28,079 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 439 transitions. [2021-05-06 08:22:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:22:28,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:28,080 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:28,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:28,293 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 2 times [2021-05-06 08:22:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021458282] [2021-05-06 08:22:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:28,299 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:28,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491135045] [2021-05-06 08:22:28,299 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 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 08:22:28,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:28,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:22:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:28,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 08:22:28,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021458282] [2021-05-06 08:22:28,786 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:28,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491135045] [2021-05-06 08:22:28,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491135045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:28,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:28,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:22:28,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582396597] [2021-05-06 08:22:28,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:22:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:22:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:22:28,787 INFO L87 Difference]: Start difference. First operand 319 states and 439 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:29,564 INFO L93 Difference]: Finished difference Result 413 states and 567 transitions. [2021-05-06 08:22:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:22:29,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 08:22:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:29,567 INFO L225 Difference]: With dead ends: 413 [2021-05-06 08:22:29,567 INFO L226 Difference]: Without dead ends: 412 [2021-05-06 08:22:29,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:22:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-06 08:22:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2021-05-06 08:22:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 216 states have (on average 1.1898148148148149) internal successors, (257), 221 states have internal predecessors, (257), 143 states have call successors, (143), 29 states have call predecessors, (143), 28 states have return successors, (141), 137 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-06 08:22:29,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 541 transitions. [2021-05-06 08:22:29,579 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 541 transitions. Word has length 91 [2021-05-06 08:22:29,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:29,579 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 541 transitions. [2021-05-06 08:22:29,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:22:29,580 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 541 transitions. [2021-05-06 08:22:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:22:29,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:29,581 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2021-05-06 08:22:29,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:22:29,800 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1005767165, now seen corresponding path program 2 times [2021-05-06 08:22:29,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:29,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045642890] [2021-05-06 08:22:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:29,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:29,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256318844] [2021-05-06 08:22:29,815 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 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 08:22:29,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:29,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:29,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 08:22:29,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:29,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,259 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-06 08:22:30,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-05-06 08:22:30,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:30,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045642890] [2021-05-06 08:22:30,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:30,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256318844] [2021-05-06 08:22:30,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256318844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:30,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:30,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:30,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585350338] [2021-05-06 08:22:30,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:30,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:30,501 INFO L87 Difference]: Start difference. First operand 388 states and 541 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:31,081 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 08:22:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:31,437 INFO L93 Difference]: Finished difference Result 429 states and 600 transitions. [2021-05-06 08:22:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 08:22:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:31,439 INFO L225 Difference]: With dead ends: 429 [2021-05-06 08:22:31,439 INFO L226 Difference]: Without dead ends: 429 [2021-05-06 08:22:31,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:22:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-06 08:22:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 409. [2021-05-06 08:22:31,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 224 states have (on average 1.1919642857142858) internal successors, (267), 230 states have internal predecessors, (267), 155 states have call successors, (155), 30 states have call predecessors, (155), 29 states have return successors, (153), 148 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-06 08:22:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 575 transitions. [2021-05-06 08:22:31,450 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 575 transitions. Word has length 96 [2021-05-06 08:22:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:31,450 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 575 transitions. [2021-05-06 08:22:31,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 08:22:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 575 transitions. [2021-05-06 08:22:31,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:22:31,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:31,451 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:31,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:22:31,665 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 561452732, now seen corresponding path program 2 times [2021-05-06 08:22:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310787455] [2021-05-06 08:22:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:31,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:31,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016096010] [2021-05-06 08:22:31,671 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 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 08:22:31,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:31,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 08:22:31,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-05-06 08:22:31,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:31,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310787455] [2021-05-06 08:22:31,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:31,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016096010] [2021-05-06 08:22:31,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016096010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:31,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:31,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:22:31,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803347909] [2021-05-06 08:22:31,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:31,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:31,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:31,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:31,875 INFO L87 Difference]: Start difference. First operand 409 states and 575 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:32,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:32,085 INFO L93 Difference]: Finished difference Result 571 states and 848 transitions. [2021-05-06 08:22:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2021-05-06 08:22:32,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:32,087 INFO L225 Difference]: With dead ends: 571 [2021-05-06 08:22:32,087 INFO L226 Difference]: Without dead ends: 571 [2021-05-06 08:22:32,088 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-06 08:22:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 518. [2021-05-06 08:22:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 256 states have (on average 1.20703125) internal successors, (309), 271 states have internal predecessors, (309), 231 states have call successors, (231), 31 states have call predecessors, (231), 30 states have return successors, (229), 215 states have call predecessors, (229), 229 states have call successors, (229) [2021-05-06 08:22:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 769 transitions. [2021-05-06 08:22:32,102 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 769 transitions. Word has length 101 [2021-05-06 08:22:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:32,102 INFO L480 AbstractCegarLoop]: Abstraction has 518 states and 769 transitions. [2021-05-06 08:22:32,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 08:22:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 769 transitions. [2021-05-06 08:22:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 08:22:32,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:32,103 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:32,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:32,317 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:32,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:32,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 5 times [2021-05-06 08:22:32,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:32,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241145893] [2021-05-06 08:22:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:32,324 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591658403] [2021-05-06 08:22:32,324 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 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 08:22:32,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:22:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:32,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 08:22:32,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:32,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:32,879 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-06 08:22:33,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:22:33,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241145893] [2021-05-06 08:22:33,176 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:33,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591658403] [2021-05-06 08:22:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591658403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:33,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:33,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:22:33,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168334912] [2021-05-06 08:22:33,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:22:33,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:33,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:22:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:22:33,177 INFO L87 Difference]: Start difference. First operand 518 states and 769 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:33,844 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-06 08:22:34,062 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-06 08:22:34,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:34,533 INFO L93 Difference]: Finished difference Result 655 states and 984 transitions. [2021-05-06 08:22:34,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:22:34,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 08:22:34,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:34,534 INFO L225 Difference]: With dead ends: 655 [2021-05-06 08:22:34,534 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:34,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:22:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:22:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:34,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2021-05-06 08:22:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:34,535 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:34,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 08:22:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:34,535 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:34,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:22:34,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:34 BasicIcfg [2021-05-06 08:22:34,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:34,744 INFO L168 Benchmark]: Toolchain (without parser) took 20336.65 ms. Allocated memory was 192.9 MB in the beginning and 374.3 MB in the end (delta: 181.4 MB). Free memory was 158.4 MB in the beginning and 165.8 MB in the end (delta: -7.4 MB). Peak memory consumption was 175.4 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 192.9 MB. Free memory is still 174.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.59 ms. Allocated memory is still 192.9 MB. Free memory was 158.3 MB in the beginning and 148.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: Boogie Preprocessor took 63.42 ms. Allocated memory is still 192.9 MB. Free memory was 148.1 MB in the beginning and 176.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: RCFGBuilder took 351.91 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 158.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: IcfgTransformer took 19.97 ms. Allocated memory is still 192.9 MB. Free memory was 158.8 MB in the beginning and 157.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L168 Benchmark]: TraceAbstraction took 19740.38 ms. Allocated memory was 192.9 MB in the beginning and 374.3 MB in the end (delta: 181.4 MB). Free memory was 157.3 MB in the beginning and 165.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 174.2 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:34,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 192.9 MB. Free memory is still 174.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 153.59 ms. Allocated memory is still 192.9 MB. Free memory was 158.3 MB in the beginning and 148.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.42 ms. Allocated memory is still 192.9 MB. Free memory was 148.1 MB in the beginning and 176.1 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 351.91 ms. Allocated memory is still 192.9 MB. Free memory was 176.1 MB in the beginning and 158.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.97 ms. Allocated memory is still 192.9 MB. Free memory was 158.8 MB in the beginning and 157.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19740.38 ms. Allocated memory was 192.9 MB in the beginning and 374.3 MB in the end (delta: 181.4 MB). Free memory was 157.3 MB in the beginning and 165.8 MB in the end (delta: -8.5 MB). Peak memory consumption was 174.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19703.6ms, OverallIterations: 24, TraceHistogramMax: 12, EmptinessCheckTime: 28.2ms, AutomataDifference: 7381.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1165 SDtfs, 1052 SDslu, 6427 SDs, 0 SdLazy, 6518 SolverSat, 777 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4333.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1620 GetRequests, 1305 SyntacticMatches, 7 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4179.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=518occurred in iteration=23, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 245.2ms AutomataMinimizationTime, 24 MinimizatonAttempts, 524 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 183.8ms SsaConstructionTime, 653.2ms SatisfiabilityAnalysisTime, 5451.4ms InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1513 ConstructedInterpolants, 0 QuantifiedInterpolants, 7781 SizeOfPredicates, 133 NumberOfNonLiveVariables, 4840 ConjunctsInSsa, 637 ConjunctsInUnsatCore, 24 InterpolantComputations, 7 PerfectInterpolantSequences, 1949/2232 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...