/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:56:56,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:56:56,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:56:56,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:56:56,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:56:56,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:56:56,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:56:56,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:56:56,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:56:56,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:56:56,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:56:56,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:56:56,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:56:56,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:56:56,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:56:56,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:56:56,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:56:56,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:56:56,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:56:56,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:56:56,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:56:56,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:56:56,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:56:56,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:56:56,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:56:56,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:56:56,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:56:56,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:56:56,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:56:56,368 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:56:56,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:56:56,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:56:56,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:56:56,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:56:56,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:56:56,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:56:56,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:56:56,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:56:56,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:56:56,372 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:56:56,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:56:56,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:56:56,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:56:56,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:56:56,374 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:56:56,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:56:56,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:56:56,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:56:56,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:56:56,596 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:56:56,597 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:56:56,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-02 20:56:56,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ad42819/963be697295e40259389ddbe1c1ee873/FLAGd0d004d56 [2021-05-02 20:56:56,959 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:56:56,959 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c [2021-05-02 20:56:56,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ad42819/963be697295e40259389ddbe1c1ee873/FLAGd0d004d56 [2021-05-02 20:56:56,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ad42819/963be697295e40259389ddbe1c1ee873 [2021-05-02 20:56:56,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:56:56,982 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:56:56,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:56,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:56:56,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:56:56,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:56" (1/1) ... [2021-05-02 20:56:56,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728392ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:56, skipping insertion in model container [2021-05-02 20:56:56,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:56:56" (1/1) ... [2021-05-02 20:56:56,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:56:57,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:56:57,100 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c[545,558] [2021-05-02 20:56:57,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:57,116 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:56:57,123 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound2.c[545,558] [2021-05-02 20:56:57,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:56:57,141 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:56:57,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57 WrapperNode [2021-05-02 20:56:57,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:56:57,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:56:57,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:56:57,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:56:57,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:56:57,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:56:57,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:56:57,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:56:57,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (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 [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:56:57,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:56:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:56:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:56:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:56:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:56:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:56:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:56:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:56:57,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:56:57,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:56:57,484 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:56:57,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:57 BoogieIcfgContainer [2021-05-02 20:56:57,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:56:57,486 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:56:57,486 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:56:57,487 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:56:57,488 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:57" (1/1) ... [2021-05-02 20:56:57,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:57 BasicIcfg [2021-05-02 20:56:57,516 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:56:57,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:56:57,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:56:57,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:56:57,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:56:56" (1/4) ... [2021-05-02 20:56:57,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f15a6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:57, skipping insertion in model container [2021-05-02 20:56:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:56:57" (2/4) ... [2021-05-02 20:56:57,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f15a6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:56:57, skipping insertion in model container [2021-05-02 20:56:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:56:57" (3/4) ... [2021-05-02 20:56:57,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f15a6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:56:57, skipping insertion in model container [2021-05-02 20:56:57,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:56:57" (4/4) ... [2021-05-02 20:56:57,521 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.cJordan [2021-05-02 20:56:57,524 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:56:57,526 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:56:57,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:56:57,548 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:56:57,548 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:56:57,548 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:56:57,548 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:56:57,548 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:56:57,548 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:56:57,548 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:56:57,548 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:56:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:56:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:57,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:57,562 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:57,562 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:57,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:57,565 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:56:57,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:57,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291812369] [2021-05-02 20:56:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:57,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:57,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291812369] [2021-05-02 20:56:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291812369] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:57,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:57,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:56:57,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634776885] [2021-05-02 20:56:57,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:56:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:57,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:56:57,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:57,789 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:57,884 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:56:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:56:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:57,890 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:57,890 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:56:57,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:56:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:56:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:56:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:57,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:56:57,928 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:56:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:57,928 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:56:57,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:56:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:56:57,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:57,929 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:57,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:56:57,930 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:57,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:57,932 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:56:57,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154333249] [2021-05-02 20:56:57,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:58,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:58,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154333249] [2021-05-02 20:56:58,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154333249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:58,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:58,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:58,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447991257] [2021-05-02 20:56:58,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:58,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:58,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:58,054 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:58,279 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:56:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:56:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:58,282 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:56:58,282 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:56:58,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:58,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:56:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:56:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:56:58,297 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:56:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:58,297 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:56:58,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:56:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:56:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:56:58,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:58,300 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:58,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:56:58,302 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:56:58,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:58,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008946444] [2021-05-02 20:56:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:58,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:58,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604583074] [2021-05-02 20:56:58,318 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 [2021-05-02 20:56:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:56:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:58,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:58,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008946444] [2021-05-02 20:56:58,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604583074] [2021-05-02 20:56:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604583074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:56:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600829543] [2021-05-02 20:56:58,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:56:58,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:58,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:56:58,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:58,482 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:58,492 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:56:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:56:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:56:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:58,493 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:56:58,493 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:56:58,494 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:56:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:56:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:56:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:56:58,497 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:56:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:58,497 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:56:58,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:56:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:56:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:56:58,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:58,498 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:58,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:56:58,717 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:58,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:56:58,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:58,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523438] [2021-05-02 20:56:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:56:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:56:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:56:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:56:58,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:58,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523438] [2021-05-02 20:56:58,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:58,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:58,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:56:58,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274829469] [2021-05-02 20:56:58,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:56:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:56:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:56:58,813 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:59,020 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:56:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:59,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:56:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:59,023 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:56:59,023 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:56:59,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:56:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:56:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:56:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:56:59,032 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:56:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:59,032 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:56:59,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:56:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:56:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:56:59,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:59,033 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:59,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:56:59,033 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:56:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:59,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993770920] [2021-05-02 20:56:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:59,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:59,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543553889] [2021-05-02 20:56:59,058 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 [2021-05-02 20:56:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:56:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:59,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:56:59,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:59,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993770920] [2021-05-02 20:56:59,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543553889] [2021-05-02 20:56:59,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543553889] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:59,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:59,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 20:56:59,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978791194] [2021-05-02 20:56:59,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:56:59,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:59,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:56:59,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:56:59,287 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:59,398 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 20:56:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:56:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 20:56:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:59,399 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:56:59,399 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 20:56:59,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:56:59,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 20:56:59,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 20:56:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 20:56:59,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-02 20:56:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:59,403 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 20:56:59,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:56:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 20:56:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:59,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:59,404 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:59,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:59,609 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:59,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:56:59,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:59,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725138878] [2021-05-02 20:56:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:56:59,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:56:59,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132491779] [2021-05-02 20:56:59,616 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 [2021-05-02 20:56:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:56:59,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:56:59,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:56:59,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:56:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:56:59,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:56:59,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725138878] [2021-05-02 20:56:59,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:56:59,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132491779] [2021-05-02 20:56:59,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132491779] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:56:59,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:56:59,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:56:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763625360] [2021-05-02 20:56:59,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:56:59,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:56:59,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:56:59,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:59,756 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:56:59,788 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:56:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:56:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:56:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:56:59,789 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:56:59,789 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:56:59,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:56:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:56:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:56:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:56:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:56:59,793 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:56:59,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:56:59,793 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:56:59,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:56:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:56:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:56:59,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:56:59,794 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:56:59,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:56:59,996 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:56:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:56:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:56:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:56:59,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024787506] [2021-05-02 20:56:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:00,004 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:00,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706497401] [2021-05-02 20:57:00,005 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 [2021-05-02 20:57:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:57:00,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:00,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:57:00,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:00,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024787506] [2021-05-02 20:57:00,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:00,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706497401] [2021-05-02 20:57:00,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706497401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:57:00,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:57:00,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:57:00,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689424846] [2021-05-02 20:57:00,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:57:00,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:00,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:57:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:57:00,202 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (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) [2021-05-02 20:57:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:00,314 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:57:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:57:00,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (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 36 [2021-05-02 20:57:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:00,316 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:57:00,316 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:57:00,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:57:00,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:57:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:57:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:57:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:57:00,325 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:57:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:00,326 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:57:00,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (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) [2021-05-02 20:57:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:57:00,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:57:00,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:00,331 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:00,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:00,547 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:57:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:00,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436870338] [2021-05-02 20:57:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:00,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:00,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340018950] [2021-05-02 20:57:00,553 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 [2021-05-02 20:57:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:57:00,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:00,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:57:00,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:00,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436870338] [2021-05-02 20:57:00,674 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:00,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340018950] [2021-05-02 20:57:00,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340018950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:00,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:00,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:57:00,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011051381] [2021-05-02 20:57:00,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:57:00,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:00,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:57:00,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:57:00,675 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:57:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:00,704 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:57:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:57:00,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:57:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:00,705 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:57:00,705 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:57:00,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:57:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:57:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:57:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:57:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:57:00,708 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:57:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:00,708 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:57:00,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:57:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:57:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:57:00,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:00,709 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:00,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:00,917 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:57:00,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:00,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007306331] [2021-05-02 20:57:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:00,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:00,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538129443] [2021-05-02 20:57:00,924 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 [2021-05-02 20:57:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:01,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:57:01,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:01,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:57:01,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:01,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007306331] [2021-05-02 20:57:01,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:01,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538129443] [2021-05-02 20:57:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538129443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:57:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911222742] [2021-05-02 20:57:01,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:57:01,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:01,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:57:01,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:57:01,229 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:57:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:01,383 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-05-02 20:57:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:57:01,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 20:57:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:01,385 INFO L225 Difference]: With dead ends: 75 [2021-05-02 20:57:01,385 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 20:57:01,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:57:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 20:57:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-05-02 20:57:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 46 states have internal predecessors, (53), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:57:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-05-02 20:57:01,388 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 46 [2021-05-02 20:57:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:01,388 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-05-02 20:57:01,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 20:57:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-05-02 20:57:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:57:01,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:01,389 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:01,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:01,594 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:01,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:57:01,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:01,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759334382] [2021-05-02 20:57:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:01,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:01,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485536176] [2021-05-02 20:57:01,601 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 [2021-05-02 20:57:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:57:01,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:57:01,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:57:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:57:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:57:01,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:57:01,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759334382] [2021-05-02 20:57:01,865 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:57:01,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485536176] [2021-05-02 20:57:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485536176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:57:01,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:57:01,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:57:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726749677] [2021-05-02 20:57:01,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:57:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:57:01,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:57:01,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:57:01,867 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:57:02,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:57:02,027 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2021-05-02 20:57:02,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:57:02,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:57:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:57:02,029 INFO L225 Difference]: With dead ends: 92 [2021-05-02 20:57:02,029 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 20:57:02,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:57:02,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 20:57:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2021-05-02 20:57:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 54 states have internal predecessors, (63), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:57:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2021-05-02 20:57:02,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 54 [2021-05-02 20:57:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:57:02,034 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2021-05-02 20:57:02,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:57:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2021-05-02 20:57:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:57:02,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:57:02,035 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:57:02,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:57:02,240 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:57:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:57:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash 973937241, now seen corresponding path program 1 times [2021-05-02 20:57:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:57:02,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448858496] [2021-05-02 20:57:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:57:02,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:57:02,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964879806] [2021-05-02 20:57:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:57:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:57:02,322 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:57:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:57:02,340 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:57:02,379 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:57:02,379 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:57:02,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:57:02,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:57:02 BasicIcfg [2021-05-02 20:57:02,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:57:02,610 INFO L168 Benchmark]: Toolchain (without parser) took 5628.58 ms. Allocated memory was 190.8 MB in the beginning and 232.8 MB in the end (delta: 41.9 MB). Free memory was 156.5 MB in the beginning and 146.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 52.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 158.15 ms. Allocated memory is still 190.8 MB. Free memory was 156.2 MB in the beginning and 146.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: Boogie Preprocessor took 74.40 ms. Allocated memory is still 190.8 MB. Free memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: RCFGBuilder took 268.28 ms. Allocated memory is still 190.8 MB. Free memory was 173.8 MB in the beginning and 158.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: IcfgTransformer took 30.22 ms. Allocated memory is still 190.8 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L168 Benchmark]: TraceAbstraction took 5092.85 ms. Allocated memory was 190.8 MB in the beginning and 232.8 MB in the end (delta: 41.9 MB). Free memory was 156.3 MB in the beginning and 146.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 51.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:57:02,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 190.8 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 158.15 ms. Allocated memory is still 190.8 MB. Free memory was 156.2 MB in the beginning and 146.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 74.40 ms. Allocated memory is still 190.8 MB. Free memory was 146.3 MB in the beginning and 174.1 MB in the end (delta: -27.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 268.28 ms. Allocated memory is still 190.8 MB. Free memory was 173.8 MB in the beginning and 158.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.22 ms. Allocated memory is still 190.8 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5092.85 ms. Allocated memory was 190.8 MB in the beginning and 232.8 MB in the end (delta: 41.9 MB). Free memory was 156.3 MB in the beginning and 146.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 51.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=-2147483649, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=0, d=-2147483649, p=1, q=0, r=-2147483649] [L35] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, counter++=0, d=-2147483649, p=1, q=0, r=-2147483649] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-2147483649, p=1, q=0, r=-2147483649] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=1, d=-4294967298, p=2, q=0, r=-2147483649] [L35] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, counter++=1, d=-4294967298, p=2, q=0, r=-2147483649] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=2, d=-4294967298, p=2, q=0, r=-2147483649] [L45] EXPR counter++ VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=3, counter++=2, d=-4294967298, p=2, q=0, r=-2147483649] [L45] COND FALSE !(counter++<2) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=-2147483649, B=-2147483649, counter=3, d=-4294967298, p=2, q=0, r=-2147483649] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5033.8ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 18.3ms, AutomataDifference: 1178.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 411 SDtfs, 206 SDslu, 1245 SDs, 0 SdLazy, 652 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 608.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 551.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=10, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 70.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 70.6ms SsaConstructionTime, 424.2ms SatisfiabilityAnalysisTime, 1182.2ms InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1168 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 186/199 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...