/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:59:05,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:59:05,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:59:05,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:59:05,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:59:05,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:59:05,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:59:06,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:59:06,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:59:06,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:59:06,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:59:06,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:59:06,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:59:06,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:59:06,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:59:06,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:59:06,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:59:06,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:59:06,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:59:06,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:59:06,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:59:06,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:59:06,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:59:06,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:59:06,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:59:06,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:59:06,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:59:06,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:59:06,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:59:06,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:59:06,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:59:06,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:59:06,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:59:06,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:59:06,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:59:06,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:59:06,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:59:06,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:59:06,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:59:06,064 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:59:06,064 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:59:06,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:59:06,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:59:06,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:59:06,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:59:06,419 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:59:06,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2021-05-06 08:59:06,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4bfaec84/46b8eef03afd4df68db6d53088a30b3a/FLAG7ebf8508e [2021-05-06 08:59:06,979 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:59:06,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound5.c [2021-05-06 08:59:06,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4bfaec84/46b8eef03afd4df68db6d53088a30b3a/FLAG7ebf8508e [2021-05-06 08:59:07,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4bfaec84/46b8eef03afd4df68db6d53088a30b3a [2021-05-06 08:59:07,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:59:07,482 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:59:07,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:59:07,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:59:07,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:59:07,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e7ea709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07, skipping insertion in model container [2021-05-06 08:59:07,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:59:07,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:59:07,656 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_unwindbound5.c[545,558] [2021-05-06 08:59:07,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:59:07,679 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:59:07,718 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_unwindbound5.c[545,558] [2021-05-06 08:59:07,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:59:07,750 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:59:07,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07 WrapperNode [2021-05-06 08:59:07,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:59:07,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:59:07,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:59:07,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:59:07,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... [2021-05-06 08:59:07,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:59:07,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:59:07,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:59:07,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:59:07,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:59:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:59:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:59:07,860 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:59:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:59:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:59:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:59:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:59:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:59:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:59:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:59:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:59:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:59:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:59:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:59:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:59:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:59:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:59:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:59:07,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:59:07,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:59:08,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:59:08,219 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:59:08,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:59:08 BoogieIcfgContainer [2021-05-06 08:59:08,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:59:08,222 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:59:08,222 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:59:08,223 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:59:08,225 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:59:08" (1/1) ... [2021-05-06 08:59:08,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:59:08 BasicIcfg [2021-05-06 08:59:08,240 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:59:08,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:59:08,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:59:08,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:59:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:59:07" (1/4) ... [2021-05-06 08:59:08,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcd88ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:59:08, skipping insertion in model container [2021-05-06 08:59:08,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:59:07" (2/4) ... [2021-05-06 08:59:08,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcd88ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:59:08, skipping insertion in model container [2021-05-06 08:59:08,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:59:08" (3/4) ... [2021-05-06 08:59:08,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcd88ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:59:08, skipping insertion in model container [2021-05-06 08:59:08,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:59:08" (4/4) ... [2021-05-06 08:59:08,247 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound5.cJordan [2021-05-06 08:59:08,253 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:59:08,257 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:59:08,273 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:59:08,292 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:59:08,292 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:59:08,292 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:59:08,292 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:59:08,292 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:59:08,292 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:59:08,292 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:59:08,293 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:59:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:59:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:59:08,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:08,313 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:08,313 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:59:08,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:08,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673464698] [2021-05-06 08:59:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:08,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:59:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:08,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:59:08,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:59:08,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:08,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673464698] [2021-05-06 08:59:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673464698] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:08,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:08,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:59:08,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604687313] [2021-05-06 08:59:08,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:59:08,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:59:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:59:08,583 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:59:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:08,854 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:59:08,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:59:08,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:59:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:08,864 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:59:08,864 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:59:08,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:59:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:59:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:59:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:59:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:59:08,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:59:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:08,908 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:59:08,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:59:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:59:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:59:08,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:08,909 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:08,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:59:08,910 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:59:08,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:08,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166947802] [2021-05-06 08:59:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:09,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:59:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:09,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:59:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:59:09,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166947802] [2021-05-06 08:59:09,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166947802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:09,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:09,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:59:09,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405303233] [2021-05-06 08:59:09,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:59:09,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:09,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:59:09,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:09,157 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:59:09,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:09,516 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:59:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:59:09,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:59:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:09,519 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:59:09,519 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:59:09,520 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 227.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:59:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:59:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:59:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:59:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:59:09,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:59:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:09,528 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:59:09,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:59:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:59:09,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:59:09,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:09,529 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:09,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:59:09,530 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:09,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:59:09,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:09,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203585442] [2021-05-06 08:59:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:09,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:09,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633910032] [2021-05-06 08:59:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:59:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:09,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:09,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:09,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:59:09,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203585442] [2021-05-06 08:59:09,766 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633910032] [2021-05-06 08:59:09,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633910032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:09,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:09,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:59:09,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523185452] [2021-05-06 08:59:09,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:59:09,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:09,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:59:09,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:59:09,768 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:59:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:09,779 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:59:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:59:09,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:59:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:09,781 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:59:09,781 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:59:09,781 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:59:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:59:09,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:59:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:59:09,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:59:09,787 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:59:09,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:09,787 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:59:09,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:59:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:59:09,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:59:09,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:09,788 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:10,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:59:10,013 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:59:10,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:10,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725643377] [2021-05-06 08:59:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:10,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:59:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:10,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:59:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:10,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:59:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:59:10,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:10,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725643377] [2021-05-06 08:59:10,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725643377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:10,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:10,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:59:10,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994685225] [2021-05-06 08:59:10,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:59:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:10,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:59:10,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:10,186 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:59:10,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:10,517 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:59:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:59:10,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:59:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:10,519 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:59:10,519 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:59:10,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:59:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:59:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:59:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:59:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:59:10,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:59:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:10,524 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:59:10,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:59:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:59:10,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:59:10,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:10,525 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:10,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:59:10,525 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:10,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:59:10,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:10,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772012072] [2021-05-06 08:59:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:10,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:10,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903874501] [2021-05-06 08:59:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:10,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:59:10,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:10,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:59:10,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772012072] [2021-05-06 08:59:10,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:10,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903874501] [2021-05-06 08:59:10,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903874501] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:10,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:10,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:59:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724620330] [2021-05-06 08:59:10,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:59:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:10,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:59:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:59:10,804 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:59:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:13,060 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-05-06 08:59:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:59:13,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:59:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:13,062 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:59:13,062 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:59:13,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:59:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:59:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:59:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 08:59:13,072 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 08:59:13,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:13,072 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 08:59:13,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:59:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 08:59:13,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:59:13,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:13,073 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:13,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:13,279 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:13,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:59:13,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:13,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141442527] [2021-05-06 08:59:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:13,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:13,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [718384386] [2021-05-06 08:59:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:13,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:59:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:13,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:59:13,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:13,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141442527] [2021-05-06 08:59:13,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:13,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718384386] [2021-05-06 08:59:13,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718384386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:13,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:13,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:59:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813046575] [2021-05-06 08:59:13,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:59:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:13,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:59:13,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:59:13,499 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:59:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:13,563 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-05-06 08:59:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:59:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:59:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:13,568 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:59:13,569 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:59:13,569 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:59:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:59:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:59:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:59:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 08:59:13,587 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 08:59:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:13,588 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 08:59:13,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:59:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 08:59:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:59:13,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:13,589 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:13,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:13,801 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:59:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:13,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683572549] [2021-05-06 08:59:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:13,813 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:13,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003819155] [2021-05-06 08:59:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 08:59:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:14,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:59:14,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683572549] [2021-05-06 08:59:14,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003819155] [2021-05-06 08:59:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003819155] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:59:14,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:59:14,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:59:14,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133085375] [2021-05-06 08:59:14,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:59:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:14,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:59:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:14,083 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:59:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:14,264 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2021-05-06 08:59:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:59:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:59:14,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:14,268 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:59:14,268 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 08:59:14,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:59:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 08:59:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 08:59:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:59:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 08:59:14,275 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 08:59:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:14,275 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 08:59:14,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:59:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 08:59:14,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:59:14,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:14,276 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:14,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:14,493 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:14,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:14,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:59:14,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:14,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507880288] [2021-05-06 08:59:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:14,500 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:14,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438162078] [2021-05-06 08:59:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:14,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:59:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:14,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:59:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:14,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507880288] [2021-05-06 08:59:14,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:14,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438162078] [2021-05-06 08:59:14,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438162078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:59:14,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:59:14,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:59:14,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051201191] [2021-05-06 08:59:14,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:59:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:59:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:59:14,681 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:59:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:14,766 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-05-06 08:59:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:59:14,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:59:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:14,769 INFO L225 Difference]: With dead ends: 80 [2021-05-06 08:59:14,769 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 08:59:14,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:14,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 08:59:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 08:59:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:59:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 08:59:14,788 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 08:59:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:14,790 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 08:59:14,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:59:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 08:59:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:59:14,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:14,795 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:15,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:15,014 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:59:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:15,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451846859] [2021-05-06 08:59:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:15,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:15,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746522528] [2021-05-06 08:59:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:15,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:59:15,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:15,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:59:15,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:15,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451846859] [2021-05-06 08:59:15,296 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:15,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746522528] [2021-05-06 08:59:15,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746522528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:59:15,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:59:15,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:59:15,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950335025] [2021-05-06 08:59:15,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:59:15,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:59:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:15,298 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:59:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:17,724 INFO L93 Difference]: Finished difference Result 95 states and 117 transitions. [2021-05-06 08:59:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:59:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:59:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:17,726 INFO L225 Difference]: With dead ends: 95 [2021-05-06 08:59:17,726 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 08:59:17,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:59:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 08:59:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 08:59:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:59:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 08:59:17,749 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 08:59:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:17,750 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 08:59:17,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:59:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 08:59:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:59:17,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:17,751 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:17,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:17,958 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:17,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash 450187565, now seen corresponding path program 1 times [2021-05-06 08:59:17,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:17,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101688291] [2021-05-06 08:59:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:17,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:17,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136573142] [2021-05-06 08:59:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:59:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:59:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:59:18,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:59:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:59:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:59:18,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:59:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101688291] [2021-05-06 08:59:18,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:59:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136573142] [2021-05-06 08:59:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136573142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:59:18,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:59:18,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:59:18,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683986563] [2021-05-06 08:59:18,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:59:18,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:59:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:59:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:59:18,172 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:59:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:59:18,285 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-05-06 08:59:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:59:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 08:59:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:59:18,287 INFO L225 Difference]: With dead ends: 115 [2021-05-06 08:59:18,287 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 08:59:18,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:59:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 08:59:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 08:59:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:59:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 08:59:18,293 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 08:59:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:59:18,293 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 08:59:18,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 08:59:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 08:59:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:59:18,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:59:18,295 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:59:18,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:59:18,511 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:59:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:59:18,511 INFO L82 PathProgramCache]: Analyzing trace with hash 451289832, now seen corresponding path program 1 times [2021-05-06 08:59:18,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:59:18,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291283936] [2021-05-06 08:59:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:59:18,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:59:18,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683470365] [2021-05-06 08:59:18,518 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